Adipocytes are cells that store lipids as droplets that fill most of the cytoplasm. Compact bone is solid and has greater structural strength. These layers are referred to as the superficial fascia, deep fascia, and subserous fascia (Figure \(\PageIndex{9}\)). 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. Supportive connective tissue—bone and cartilage—provide structure and strength to the body and protect soft tissues. Reticular fibers are also formed from the same protein subunits as collagen fibers; however, these fibers remain narrow and are arrayed in a branching network. Secreted by fibroblasts, ground substance is made of polysaccharides, specifically hyaluronic acid, and proteins. The fragmented nature of the tissue (the slits seen throughout) is an artifact of preparing the tissue for sectioning as a microscopic slide. Cardiovascular%20System/081-3_HISTO_40X.svs/view.apml) to explore the tissue sample in greater detail. 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. It contains all the cell types and fibers previously described and is distributed in a random, web-like fashion. 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.. What type of connective tissue should you expect ligaments to contain? 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. Hyaline Cartilage Structure – The chondrocytes (cells) lie in lacunae (spaces around cells). Most often, the condition results from repetitive motions over time that strain the tendons needed to perform the tasks. Access for free at https://openstax.org/books/anatomy-and-physiology. Connective Tissue Associated with Muscle Tissue Quiz: Connective Tissue Associated with Muscle Tissue Structure of Skeletal Muscle Quiz: Structure of Skeletal Muscle Muscle Contraction Types … Dense Regular Connective 40x . • Dense regular connective tissue • Dense irregular connective tissue. Dense regular tissue, small intestine, 10X objective, 100X total. Osteocytes, bone cells like chondrocytes, are located within lacunae. Cells circulate in a liquid extracellular matrix. Elastic cartilage can stretch and recoil to its original shape because of its high content of elastic fibers. Examples of typical dense regular and dense irregular connective tissues consisting primarily of collagen fibers are shown in (Figure \(\PageIndex{5}\)). Dense regular elastic tissue contains elastic fibers in addition to collagen fibers. Q. This is not where connective tissue roles end. Neuron 100x . The superficial fascia is found just deep to the cutaneous membrane (or skin) and is typically composed of a combination of areolar and adipose connective tissues. Elastic fibers contain the protein elastin along with lesser amounts of other proteins and glycoproteins. The dense fibrous regular connective tissue slide is sometimes labeled white fibrous tissue. EXERCISE 6 - Loose connective tissue Step 1: Which of the labeled structures is responsible for that quality? As you have seen from the tissue types discussed above, the main role of connective tissues is to form the structural framework of the body. You can also put your logo at the top or bottom corner of the label. Discuss how blood fulfills this role. Integument: Thick skin -labeled slides 13 Terms. Ligaments and tendons are made of dense regular connective tissue, but in ligaments not all fibers are parallel. The first connective tissue to develop in the embryo is mesenchyme, the stem cell line from which all connective tissues are later derived. This is a factor contributing to the very slow healing of cartilaginous tissues. Cartilage and bone are supportive 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. Histology Learning System [ Connective Tissue, dense regular connective tissue, longitudinal] Numerous chondrocytes are located within their lacunae and are spaced between the fibers. The major component of the matrix is a ground substance often crisscrossed by protein fibers. It serves to connect the cutaneous membrane to the underlying organs. 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. Severe cases of tendinitis can even tear loose a tendon. anatomy tissue #2 Learn with flashcards, games, and more — for free. Fibers interwoven in different directions to pull in different directions. 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. The formed elements circulating in blood are all derived from hematopoietic stem cells located in bone marrow (Figure \(\PageIndex{8}\)). Function Loose Connective Tissue: The major function of the loose connective tissue is to serve as a supporting matrix for the blood vessels, lymphatic vessels, nerves, muscle fibers, organs, and the skin. Browse. By the end of the section, you will be able to: As may be obvious from its name, one of the major functions of connective tissue is to connect tissues and organs. Click here to let us know! White adipose tissue can be found protecting the kidneys and cushioning the back of the eye. Dense Regular Connective Tissue. Both tissues have a variety of cell types and protein fibers suspended in a viscous ground substance. Gardenwoodresort. Macrophages, mast cells, lymphocytes, and plasma cells are found in connective tissue proper but are actually part of the immune system protecting the body. Navigation best viewed on larger screens. 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. tendons and ligaments. In loose connective tissue, the fibers are loosely organized, leaving large spaces in between. Quizlet flashcards, activities and games help you improve your grades. Dense packing od component fibers maximum strength to this tissue. Collagen fibers, while flexible, have great tensile strength, resist stretching, and give ligaments and tendons their characteristic resilience and strength. [ "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. Be able to recognize a basement membrane (or basal lamina) in sections or micrographs where the structure is conspicuously present and understand its functions. Start studying Histology Lippincott Chapter 3 (Connective Tissue). Areolar tissue shows little specialization. They are found throughout the body, but are most abundant in the reticular tissue of soft organs, such as liver and spleen, where they anchor and provide structural support to the parenchyma (the functional cells, blood vessels, and nerves of the organ). Which connective tissue specializes in storage of fat? Anatomy A215 Virtual Microscopy . Recall from the first section of this chapter that membranes form all the body linings and are made up of epithelial tissues with a layer of underlying connective tissue. Reticular tissue is a mesh-like, supportive framework for soft organs such as lymphatic tissue, the spleen, and the liver (Figure \(\PageIndex{4}\)). There are three main groups of connective tissues: Loose connective tissue holds organs in place and attaches epithelial tissue to other underlying tissues. Dense regular connective tissue fibers are parallel to each other, enhancing tensile strength and resistance to stretching in the direction of the fiber orientations. Fibroblasts are present in all connective tissue proper (Figure \(\PageIndex{1}\)). Without mineral crystals, bones would flex and provide little support. In contrast, fixed macrophages are permanent residents of their tissues. The knee and jaw joints and the intervertebral discs are examples of fibrocartilage. Dense regular connective tissue - the tissue shown has a dense, regular arrangement of collagen fibers; the cells present are fibroblasts NOT squamous epithelial cells. iii). Fibrocartilage has a dense arrangement of cartilage fibers that are arranged in an orderly manner. Which of the following correctly describes a common feature of all structures labeled A-D in the figure? Each adipose cell, or adipocyte, has its cytoplasm stretched around a … Poor blood supply, slow tissue repair. A. dense regular connective tissue B. simple squamous epithelium C. dense irregular connective tissue D. areolar connective tissue. In contrast, white fat adipocytes store lipids as a single large drop and are metabolically less active. *Response times vary by subject and question complexity. All connective tissues derive from the mesodermal layer of the embryo. ... dense regular tissue. Q. Ligaments connect bones together and withstand a lot of stress. As fibroblasts are the most common cells in areolar tissue, the majority of the nuclei seen here are probably fibroblast nuclei. Areolar tissue underlies most epithelia and represents the connective tissue component of epithelial membranes, which are described further in a later section. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Like blood cells, mast cells are derived from hematopoietic stem cells and are part of the immune system. Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers and contains large amounts of proteoglycans. elastic cartilage. Both strong and flexible, it is found in the rib cage and nose and covers bones where they meet to form moveable joints. Loose connective tissue is found between many organs where it acts both to absorb shock and bind tissues together. Tendinitis is the inflammation of a tendon, the thick band of dense regular connective tissue that attaches a muscle to a bone. 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 ECM is composed of a moderate amount of ground substance and two main types of protein fibers: elastic and reticular fibers. Adipose cells store surplus energy in the form of fat and contribute to the thermal insulation of the body. Median response time is 34 minutes and may be longer for new subjects. It allows water, salts, and various nutrients to diffuse through to adjacent or embedded cells and tissues. In some tissues, fibers crisscross and form a mesh. Blood contains formed elements derived from bone marrow. On rare occasions, a sudden serious injury will cause tendinitis. In other tissues, stretching in several directions is achieved by alternating layers where fibers run in the same orientation in each layer, and it is the layers themselves that are stacked at an angle. ii). The latter is sub-divided into two categories — regular and irregular — that are classified based on the arrangement of the tissue's fibers. Organ capsules (collagenous type) and walls of arteries (elastic type) contain dense irregular connective tissue. Connective tissues separate and cushion organs, protecting them from shifting or traumatic injury. elastic cartilage. In all cases, overuse of the joint causes a microtrauma that initiates the inflammatory response. dense fibrous connective tissue; regular, tendon, 250x at 35mm. Among the four main basic types of animal tissues, connective tissue is one of the major types present. Leukocytes, white blood cells, are responsible for defending against potentially harmful microorganisms or molecules. 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]). The matrix usually includes a large amount of extracellular material produced by the connective tissue cells that are embedded within it. Hyaline cartilage is smooth and clear, covers the articulating surfaces of bones, and is found in the growing portion of bones. In this variety of dense connective tissue, the fibers are densely packed and are arranged parallel to each other. Connective tissues provide support and assist movement, store and transport energy molecules, protect against infections, and contribute to temperature homeostasis. The fibers are mainly composed of type I collagen. Dense regular connective tissue: In this type of tissue, the collagen fibres are densely packed, and arranged in parallel. Connective tissue proper includes loose connective tissue and dense connective tissue. Loose connective tissue proper includes adipose tissue, areolar tissue, and reticular tissue. Nutrients, salts, and waste are dissolved in the liquid matrix and transported through the body. Bones are made of a rigid, mineralized matrix containing calcium salts, crystals, and osteocytes lodged in lacunae. Legal. Bone tissue is highly vascularized. The mast cell, found in connective tissue proper, has many cytoplasmic granules. She issues a stern warning about the risk of aggravating the condition and the possibility of surgery. Q. elastic tissue. The histology of transverse tissue from long bone (Figure \(\PageIndex{7}\)) shows a typical arrangement of osteocytes in concentric circles around a central canal. A. In fluid connective tissue, in other words, lymph and blood, various specialized cells circulate in a watery fluid containing salts, nutrients, and dissolved proteins. Collagen runs parallel to the direction of pull. Many different cells contribute to the formation of connective tissues. Human Anatomy and Physiology (BIOL& 241L-242L) Karen Hart, Peninsula College: Epithelial tissue; Connective tissue proper. Cancellous bone is spongy and less solid than compact bone. elastic cartilage. An easy and convenient way to make label is to generate some ideas first. The collagen fibers (cf) are parallel to … Dense irregular connective tissue 100X Silver stain Most of the tissue you see in this image is dense irregular connective tissue (dict). This layer of areolar connective tissue serves as an anchor for the serous membranes to surrounding superficial structures. Some appear in cross section, and other longitudinally. The surface of hyaline cartilage is smooth. dense regular connective tissue. These fibers are produced by fibroblasts in the tissue. These cells can differentiate into any type of connective tissue cells needed for repair and healing of damaged tissue. Have questions or comments? 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 … Collagen fibers are made from fibrous protein subunits linked together to form a long and straight fiber. Platelets are cell fragments involved in blood clotting. A second type of embryonic connective tissue forms in the umbilical cord, called mucous connective tissue or Wharton’s jelly. This tissue is no longer present after birth, leaving only scattered mesenchymal cells throughout the body. Connective tissues perform many functions in the body, but most importantly, they support and connect other tissues; from the connective tissue sheath that surrounds muscle cells, to the tendons that attach muscles to bones, and to the skeleton that supports the positions of the body. Tug gently at your ear lobes, and notice that the lobes return to their initial shape. The matrix plays a major role in the functioning of this tissue. Although repetitive motions are unavoidable in many activities and may lead to tendinitis, precautions can be taken that can lessen the probability of developing tendinitis. Adipose tissue consists mostly of fat storage cells, with little extracellular matrix (Figure \(\PageIndex{2}\)). As you toss the ball high in the air, a burning pain shoots across your wrist and you drop the tennis racket. An easy and convenient way to make label is to generate some ideas first. Crowded between the collagen fibers are rows of fibroblasts, fiber-forming cells, that generate the fibers. A layer of dense irregular connective tissue covers cartilage. reticular. This arrangement gives the tissue greater strength in all directions and less strength in one particular direction. With proper rest and managed care, you will be back on the court to hit that slice-spin serve over the net. 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. In bone, the matrix is rigid and described as calcified because of the deposited calcium salts. 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. Under the microscope, a tissue specimen shows cells located in spaces scattered in a transparent background. Blood is a fluid connective tissue, a variety of specialized cells that circulate in a watery fluid containing salts, nutrients, and dissolved proteins in a liquid extracellular matrix. 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. Composed mainly of dense connective tissues, it serves as a tough, internal framework that surrounds muscles, bones, and nerves. 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. Protection is another major function of connective tissue, in the form of fibrous capsules and bones that protect delicate organs and, of course, the skeletal system. The other specialised types of connective tissue are covered in other topics. Dense regular connective tissue fibers are parallel to each other, enhancing tensile strength and resistance to stretching in the direction of the fiber orientations. It is found in areas of the body where large amounts of tensile strength are required, like in ligaments, tendons and aponeurosis. The macrophage cells are an essential component of the immune system, which is the body’s defense against potential pathogens and degraded host cells. Create. Fibrocartilage is tough because it has thick bundles of collagen fibers dispersed through its matrix. The number and type of adipocytes depends on the tissue and location, and vary among individuals in the population. A. cells, ground substance, and carbohydrate fibers, B. cells, ground substance, and protein fibers, C. collagen, ground substance, and protein fibers. Labels are usually small in size, so you should carefully choose the font of the texts to make sure it is readable. Three main types of fibers are secreted by fibroblasts: collagen fibers, elastic fibers, and reticular fibers. Dense connective tissue proper is richer in fibers and may be regular, with fibers oriented in parallel as in ligaments and tendons, or irregular, with fibers oriented in several directions. Encourage them to consult lab manual Figures 6.3–6.7, available histology texts, and each other for help. A few distinct cell types and densely packed fibers in a matrix characterize these tissues. 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