In many sources, this type is listed as connective tissue proper; however, … In adults, new connective tissue cells originate from the ________. Leukocytes, or white blood cells, are responsible for the defense of the organism against potentially harmful microorganisms or molecules. She recommends icing the tender area, taking non-steroidal anti-inflammatory medication to ease the pain and to reduce swelling, and complete rest for a few weeks. Note that the chondrocytes are surrounded by a matrix which helps differentiate fibrocartilage from dense connective tissue. Adipose tissue consists mostly of fat storage cells, with little extracellular matrix (Figure \(\PageIndex{2}\)). cartilage - (see the topic on bone and cartilage) adipose tissue (see adipose cells) Reticular cells produce the reticular fibers that form the network onto which other cells attach. Loose connective tissue (LCT), also called areolar tissue, belongs to the category of connective tissue proper. The latter is sub-divided into two categories — regular and irregular — that are classified based on the arrangement of the tissue's fibers. Fibroblasts are the most abundant and secrete many protein fibers, adipocytes specialize in fat storage, hematopoietic cells from the bone marrow give rise to all the blood cells, chondrocytes form cartilage, and osteocytes form bone. It derives its name from the Latin reticulus, which means “little net.”. Loose connective tissue Dense connective tissue (regular and irregular) Specialized connective tissues: Cartilage Bone Adipose Blood: For more details about connective tissue, take a look at the following study unit: Cells and tissues Explore study unit Characteristics. Answer: Click at the bottom of the quiz for the answers. The other specialised types of connective tissue are covered in other topics. Dense irregular connective tissue 100X Silver stain Most of the tissue you see in this image is dense irregular connective tissue (dict). Heparin, also released as part of the inflammatory response, acts as an anticoagulant that prevents the formation of blood clots. It is thicker and stronger than loose connective tissue and forms a protective capsule layer around organs such as the liver and kidneys. ; Dense connective tissue helps attach muscles to bones and link bones together at joints. ... Epithelian tissue labeled slides 32 Terms. Be able to recognize different types of connective tissue (e.g., dense irregular, dense regular, loose, adipose) and provide examples where they are found in the body. Connective tissues provide support and assist movement, store and transport energy molecules, protect against infections, and contribute to temperature homeostasis. It fills the spaces between muscle fibers, surrounds blood and lymph vessels, and supports organs in the abdominal cavity. The mesenchymal cell is a multipotent adult stem cell. Dense Irregular Connective Tissue This image of the dermis shows irregularly oriented dense connective tissue. Areolar tissue shows little specialization. There is a large amount of extracellular matrix which is bordered on either side by the perichondrium. EXERCISE 8 - Dense regular connective tissue Step1: Why is the orientation of the fibers important for the function of the tissue? Erythrocytes, or red blood cells, transport the gases oxygen and carbon dioxide. If the closely packed bundles of fibers are located in one direction, it is called regular; if oriented in multiple directions, it is referred to as irregular. dense regular connective tissue labeled hqdefault {Label Gallery} Get some ideas to make labels for bottles, jars, packages, products, boxes or classroom activities for free. Dense regular: Tendons and ligaments are examples of dense regular connective tissue. A layer of dense irregular connective tissue, the perichondrium, encapsulates the cartilage. Polysaccharides and proteins secreted by fibroblasts combine with extra-cellular fluids to produce a viscous ground substance that, with embedded fibrous proteins, forms the extra-cellular matrix. Many different cells contribute to the formation of connective tissues. An easy and convenient way to make label is to generate some ideas first. In bone, the matrix is rigid and described as calcified because of the deposited calcium salts. Review Sheet: Exercise 6 Classification of Tissue Name Date _____ 18. Two major forms of supportive connective tissue, cartilage and bone, allow the body to maintain its posture and protect internal organs. Q. Ligaments and tendons are … Unless otherwise noted, LibreTexts content is licensed by CC BY-NC-SA 3.0. It provides protection to internal organs and supports the body. Some appear in cross section, and other longitudinally. This is probably ________. Connective tissues separate and cushion organs, protecting them from shifting or traumatic injury. The condition causes pain and tenderness in the area around a joint. Connective tissue is a heterogeneous tissue class with assorted cell shapes and tissue architecture. These tissues are widely distributed and serve as a universal packing material between other tissues. hyaline cartilage. In this variety of dense connective tissue, the fibers are densely packed and are arranged parallel to each other. Ligaments and tendons are made of dense regular connective tissue, but in ligaments not all fibers are parallel. The macrophage cell is a large cell derived from a monocyte, a type of blood cell, which enters the connective tissue matrix from the blood vessels. Crowded between the collagen fibers are rows of fibroblasts, fiber-forming cells, that generate the fibers. While older adults are at risk for tendinitis because the elasticity of tendon tissue decreases with age, active people of all ages can develop tendinitis. Dense regular elastic tissue contains elastic fibers in addition to collagen fibers. The first connective tissue to develop in the embryo is mesenchyme, the stem cell line from which all connective tissues are later derived. Elastic Connective Tissue collagenous fibers & tendons have high tensile strength - dense regular connective tissue fotografías e imágenes de stock Structures A, B, C, and D are all various types of glands. Loose connective tissue is found between many organs where it acts both to absorb shock and bind tissues together. What is tendinitis and how did it happen? Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers and contains large amounts of proteoglycans. ligaments (which link bone to bone at joints) and tendons (connections between bones or cartilage and muscle). Question: Correctly Identify This Tissue Type And Then Label The Features Of The Tissue Ground Substance Bundles Of Collagen Fibers Fibroblast Nucles Chondroblast Nuclei Reticular Fibers Lymphocytes Elastic Fibers Gland Ducts Dense Regular Connective Tissue Dense Irregular Connective Tissue Dense regular connective tissue is found in tendons or ligaments where the collagen fibers are all oriented in the same direction, (A-19, PTAH [2.5x, 10x, 20x, 40x] [10x, 20x, 40x-labeled]). Examples of typical dense regular and dense irregular connective tissues consisting primarily of collagen fibers are shown in (Figure \(\PageIndex{5}\)). Students may have trouble locating the appropriate tissue on slides with multiple tissue types. Platelets are cell fragments involved in blood clotting. An easy and convenient way to make label is to generate some ideas first. This is a factor contributing to the very slow healing of cartilaginous tissues. In all cases, overuse of the joint causes a microtrauma that initiates the inflammatory response. Unlike cartilage, bone tissue can recover from injuries in a relatively short time. Anatomy A215 Virtual Microscopy . Function. Both strong and flexible, it is found in the rib cage and nose and covers bones where they meet to form moveable joints. Dense Regular Connective 40x . Dense regular tissue, small intestine, 10X objective, 100X total. Quizlet flashcards, activities and games help you improve your grades. Dense connective tissue, also called dense fibrous tissue, is a type of connective tissue with fibers as its main matrix element. Macrophages, mast cells, lymphocytes, and plasma cells are found in connective tissue proper but are actually part of the immune system protecting the body. Collagen fibers are made from fibrous protein subunits linked together to form a long and straight fiber. Fibroblasts are present in all connective tissue proper (Figure \(\PageIndex{1}\)). Under the microscope, a tissue specimen shows cells located in spaces scattered in a transparent background. All connective tissues derive from the mesodermal layer of the embryo. Histology Learning System [ Connective Tissue, dense regular connective tissue, longitudinal] Dense regular connective tissue fibers are parallel to each other, enhancing tensile strength and resistance to stretching in the direction of the fiber orientations. There is a small amount of epithelium on the top (black) and some adipose tissue at the bottom and lower left (very light). Structurally, all connective tissues contain cells that are embedded in an extracellular matrix stabilized by proteins. Notice the dense regular arrangement of collagenous fibers. The mast cell, found in connective tissue proper, has many cytoplasmic granules. Lymph contains a liquid matrix and white blood cells. Q. Connective tissue is made of which three essential components? Cartilaginous tissue is avascular, thus all nutrients need to diffuse through the matrix to reach the chondrocytes. In case of severe pain, X-rays can be examined to rule out the possibility of a bone injury. She interrupts your protests that you cannot stop playing. elastic cartilage. A second type of embryonic connective tissue forms in the umbilical cord, called mucous connective tissue or Wharton’s jelly. Osteocytes, bone cells like chondrocytes, are located within lacunae. • Dense regular connective tissue • Dense irregular connective tissue. There are two basic types of adipocytes: white and brown. Collagen fibers, while flexible, have great tensile strength, resist stretching, and give ligaments and tendons their characteristic resilience and strength. {Label Gallery} Get some ideas to make labels for bottles, jars, packages, products, boxes or classroom activities for free. identify the tissue. Lymph drains into blood vessels, delivering molecules to the blood that could not otherwise directly enter the bloodstream. Dense Connective Tissues i). Severe cases of tendinitis can even tear loose a tendon. Strong white flexible structures. You can also put your logo at the top or bottom corner of the label. It is also of two types: white fibrous connective tissue … Dense connective tissue, also called dense fibrous tissue, is a type of connective tissue with fibers as its main matrix element. Both types contain an extensive matrix full of collagen fibers. Collagen runs parallel to the direction of pull. Organ capsules (collagenous type) and walls of arteries (elastic type) contain dense irregular connective tissue. Dense regular connective tissue fibers are parallel to each other, enhancing tensile strength and resistance to stretching in the direction of the fiber orientations. Dense connective tissue. Blood and lymph are fluid connective tissues. Click here to let us know! Hyaline Cartilage Structure – The chondrocytes (cells) lie in lacunae (spaces around cells). The dense regular connective tissue is further classified into two varieties: dense regular collagenous connective tissue and dense regular elastic connective tissue. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Adipocytes are cells that store lipids as droplets that fill most of the cytoplasm. A few distinct cell types and densely packed fibers in a matrix characterize these tissues. ... dense connective tissue types. It makes up a template of the embryonic skeleton before bone formation. These serve to hold organs and other tissues in place and, in the case of adipose tissue, isolate and store energy reserves. Due to high portions of collagenous fibers, dense irregular connective tissue provides strength, making the skin resistant to tearing by stretching forces from different directions.. No blood vessels supply cartilage tissue. Areolar tissue underlies most epithelia and represents the connective tissue component of epithelial membranes, which are described further in a later section. 2. Discuss how blood fulfills this role. Labels are usually small in size, so you should carefully choose the font of the texts to make sure it is readable. Visit this link  (http://www2.yvcc.edu/histologyzoomer...issueQuiz.html)  to test your connective tissue knowledge with this 10-question quiz. When irritated or damaged, mast cells release histamine, an inflammatory mediator, which causes vasodilation and increased blood flow at a site of injury or infection, along with itching, swelling, and redness you recognize as an allergic response. Dense Regular Connective Tissue Labeled | Creative Labels {Label Gallery} Get some ideas to make labels for bottles, jars, packages, products, boxes or classroom activities for free. e.g. [ "article:topic", "adipose tissue", "matrix", "adipocytes", "collagen fiber", "areolar tissue", "connective tissue proper", "dense connective tissue", "chondrocytes", "elastic cartilage", "elastic fiber", "fibroblast", "fibrocyte", "fibrocartilage", "fluid connective tissue", "ground substance", "hyaline cartilage", "loose connective tissue", "lacunae", "mesenchymal cell", "mucous connective tissue", "mesenchyme", "reticular fiber", "parenchyma", "reticular tissue", "supportive connective tissue", "authorname:openstax", "license:ccby", "showtoc:no", "source[1]-med-594", "source[2]-med-594", "program:oeri" ], https://med.libretexts.org/@app/auth/3/login?returnto=https%3A%2F%2Fmed.libretexts.org%2FSandboxes%2FTeam_Sandbox%253A_Anatomy_(OERI)%2F03%253A_Tissue_Level_of_Organization%2F3.04%253A_Connective_Tissue, Connective Tissue Fibers and Ground Substance, http://virtualslides.med.umich.edu/Histology/, http://www2.yvcc.edu/histologyzoomer...issueQuiz.html, https://openstax.org/books/anatomy-and-physiology, Identify and distinguish between the types of connective tissue: proper, supportive, and fluid, Explain the functions of connective tissues. Connective tissues come in a vast variety of forms, yet they typically have in common three characteristic components: cells, large amounts of amorphous ground substance, and protein fibers. All of the preventive measures aim to increase the strength of the tendon and decrease the stress put on it. Dense connective tissue is reinforced by bundles of fibers that provide tensile strength, elasticity, and protection. After examining your swollen wrist, the doctor in the emergency room announces that you have developed wrist tendinitis. Some cells have the ability to cross the endothelial layer that lines vessels and enter adjacent tissues. Specific Cells are not labeled within each tissue, remember that many of the tissues have multiple cell types, make sure you are identifying the correct cells! Fibrocytes, adipocytes, and mesenchymal cells are fixed cells, which means they remain within the connective tissue. Q. Ligaments connect bones together and withstand a lot of stress. Surgical repair of a tendon is painful. Dense Regular Connective Tissue. Dense regular connective tissue provides connection between different tissues in the human body. Dense Regular Connective Tissue - Connective Tissue Labelled Diagram With proper rest and managed care, you will be back on the court to hit that slice-spin serve over the net. Clinical/Critical Thinking Orthopedic surgeons are fond of saying, “It is better to break a bone than it is to tear a tendon or ligament.” Based on your understanding of these two types of connective tissue, explain why that would be true. The collagen fibers (cf) are parallel to … These structures are composed of densely packed collagen bundles in parallel array. Connective tissue proper includes loose connective tissue and dense connective tissue. Three main types of fibers are secreted by fibroblasts: collagen fibers, elastic fibers, and reticular fibers. The surface of hyaline cartilage is smooth. The distinctive appearance of cartilage is due to polysaccharides called chondroitin sulfates, which bind with ground substance proteins to form proteoglycans. The matrix plays a major role in the functioning of this tissue. A. Create. For more information contact us at info@libretexts.org or check out our status page at https://status.libretexts.org. These granules contain the chemical signals histamine and heparin. 3. EXERCISE 7 - Dense irregular connective tissue Where can this tissue be found? Figure 1.17 Dense regular connective tissue. These cells can differentiate into any type of connective tissue cells needed for repair and healing of damaged tissue. Encourage them to consult lab manual Figures 6.3–6.7, available histology texts, and each other for help. It serves to connect the cutaneous membrane to the underlying organs. Legal. The most abundant cell in connective tissue proper is the fibroblast. As with dense regular connective tissue, when elastic fibers running in random directions outnumber collagen fibers, the tissue is a dense irregular elastic connective tissue. Dense connective tissue is dense because of the high proportion of fibers that run parallel to each other. She consoles you by mentioning that well known tennis players such as Venus and Serena Williams and Rafael Nadal have also suffered from tendinitis related injuries. Search. The external ear contains elastic cartilage. Browse. reticular. Specialized cells in connective tissue defend the body from microorganisms that enter the body. Young athletes, dancers, and computer operators; anyone who performs the same movements constantly is at risk for tendinitis. Its cellular content is highly abundant and varied. Hyaline cartilage is smooth and clear, covers the articulating surfaces of bones, and is found in the growing portion of bones. Dense regular connective tissue 400X Tendon In this image a fibroblast nucleus (fb nuc) is labeled, but you can see other nuclei once you know what to look for. This slide contains a longitudinal section of a tendon, which is composed of dense regular connective tissue. Persons whose jobs and hobbies involve performing the same movements over and over again are often at the greatest risk of tendinitis. elastic tissue. Dense Regular Connective Tissue A Examine and draw a representative view from the microscope slide of dense regular connective tissue (white fibrous connective tissue) A For each slide, note the total magnification, the cell type (for this main class) A Name and Label the matrix, the fiber or fibers, and any other cells if present. It is found in areas of the body where large amounts of tensile strength are required, like in ligaments, tendons and aponeurosis. In dense irregular connective tissue, the direction of fibers is random. ii). Adipose tissue is a specialized type of loose connective tissue. Protein fibers fall into three major groups: collagen fibers that are thick, strong, flexible, and resist stretch; reticular fibers that are thin and form a supportive mesh; and elastin fibers that are thin and elastic. Lastly, found in between the deep fascia and the serous membranes, is the subserous fascia. Which of the tissues would be found in ligaments and tendons? Can you name the 10 tissue types shown in the histology slides? dense regular connective tissue. Bone tissue is highly vascularized. Connective tissue provides support to the organs and tissues of the body and is separated into two types: loose connective tissue, which is more abundant, and dense connective tissue. anatomy tissue #2 Learn with flashcards, games, and more — for free. The matrix usually includes a large amount of extracellular material produced by the connective tissue cells that are embedded within it. Note the regularly arranged bundles of closely packed collagen fibers running in the same direction, which results in flexible tissue with great resistance to pulling forces. Elastic fibers contain the protein elastin along with lesser amounts of other proteins and glycoproteins. A. dense regular connective tissue B. simple squamous epithelium C. dense irregular connective tissue D. areolar connective tissue. All of these fiber types are embedded in ground substance. Poor blood supply, slow tissue repair. Fluid tissue, for example blood and lymph, is characterized by a liquid matrix and no supporting fibers. The histology of transverse tissue from long bone (Figure \(\PageIndex{7}\)) shows a typical arrangement of osteocytes in concentric circles around a central canal. In loose connective tissue, the fibers are loosely organized, leaving large spaces in between. 4. The three main types of cartilage tissue are hyaline cartilage, fibrocartilage, and elastic cartilage (Figure \(\PageIndex{6}\)). Other types include epithelial tissue, muscle tissue, and nervous tissue.They are developed from the mesoderm.Connective tissues are present in between another type of tissues that establish … As you might expect, a fibrocyte, a less active form of fibroblast, is the second most common cell type in connective tissue proper. Bones are made of a rigid, mineralized matrix containing calcium salts, crystals, and osteocytes lodged in lacunae. Dense regular connective tissue - the tissue shown has a dense, regular arrangement of collagen fibers; the cells present are fibroblasts NOT squamous epithelial cells. This is not where connective tissue roles end. She issues a stern warning about the risk of aggravating the condition and the possibility of surgery. Elastic fibers are prominent in elastic tissues found in skin and the elastic ligaments of the vertebral column. Ligaments and tendons are made of dense regular connective tissue, but in ligaments not all fibers are parallel. Cartilage and bone are supportive tissue. One of the main functions of connective tissue is to integrate organs and organ systems in the body. Dense connective tissue is divided into 1) dense regular, 2) dense irregular, 3) elastic. Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. The dense fibrous regular connective tissue slide is sometimes labeled white fibrous tissue. Dense regular connective tissue is mainly made up of type I collagen fibers. The macrophage cells are an essential component of the immune system, which is the body’s defense against potential pathogens and degraded host cells. This ground substance is usually a fluid, but it can also be mineralized and solid, as in bones. Cancellous bone is spongy and less solid than compact bone. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Connective tissue in the tendon does not have abundant blood supply and heals slowly. Dense connective tissue contains more collagen fibers than does loose connective tissue. The main property of elastin is that after being stretched or compressed, it will return to its original shape. dense regular connective tissue. EXERCISE 6 - Loose connective tissue Step 1: Which of the labeled structures is responsible for that quality? 2) Dense Irregular Connective Tissue The matrix is the most abundant feature for loose tissue although adipose tissue does not have much extracellular matrix. These fibers hold connective tissues together, even during the movement of the body. 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