Types of connective tissue with examples science trends. Classification of connective tissue the histology guide. Connective tissue boundless anatomy and physiology. May 11, 2020 loose connective tissue lct, also called areolar tissue, belongs to the category of connective tissue proper. The cells sit in a matrix made up of glycoproteins, fibrous proteins and glycosoaminoglycans, which have been secreted by the fibroblasts, and the major component of the matrix, is in fact, water. Dense connective tissue, is one of the types of connective tissue also referred to as dense fibrous tissue due to relative abundance of the collagen. The lungs and arteries have a layer of elastic connective tissue that allows the stretch and recoil of these organs. In comparison to loose connective tissue, dense tissue has a higher proportion of collagenous fibers to ground substance. Elastic cartilage is a type of connective tissue that is found in the outer ear and epiglottis. Areolar connective tissue is a loosely arranged connective tissue that is widely distributed in the body and contains collagen fibers, reticular fibers and a few elastic fibers embedded in a thin, almost fluidlike ground substance. The three types of dense connective tissue are dense regular, dense irregular, and elastic tissue. Types of connective tissues with diagram animal tissue.
Histology learning system connective tissue, elastic fibers. Loose connective tissue areolar, adipose and reticular dense connective tissue regular, irregular, elastic three types of loose connective tissue. This thick, strongwalled artery has layer upon layer of elastic plates made of freely branching elastic fibers. As fibroblasts are the most common cells in areolar tissue, the majority of the nuclei seen here are probably fibroblast nuclei. Watch the full video about the elastic cartilage here. You may not embed one of our images on your web page without a link back to our site. Dense irregular connective tissue silver stain dense regular connective tissue dense fibrous c.
Connective tissue ct is a one of the four main classes of tissues. To differentiate different types of connective tissue, in a single tissue section. The yellow elastic connective tissue forms cords called ligaments which join bones to bones. This is a closer magnification of the areolar connective tissue. Like to the timber framing of a house, the connective tissue provides structure and support throughout the body. Connective tissue labeled slides flashcards quizlet. Elastic connective tissue helps maintain blood pressure and promotes normal exhalation. Elastic cartilage, which is yellow in appearance, is more pliable in connective tissue. Elastic connective tissues consist of chondrocytes cells and are made up of elastic fibers. Histology elastic connective tissue view related images. Fibrocartilage is the tough, very strong tissue found predominantly in the intervertebral disks and at the insertions of ligaments and tendons. Jun 12, 2018 elastic cartilage is a type of connective tissue that is found in the outer ear and epiglottis. Connective tissue has viscoelastic properties, defined as two components of stretch that allow elongation of the tissue. The collagenous fibers are irregularly arranged in interwoven sheets that makes the tissue very strong.
The endothelial cells are supported by a thin bed of subendothelial connective tissue that, in turn, rests upon a thick sheet of elastic tissue called the internal elastic membrane. Elastic connective tissue is a technical term for body tissue that contains a large amount of elastin, one of the proteins that make up connective tissue in general. Verhoffs hematoxylin stains the elastic fibers, and a modified massons trichrome is used to stain the other connective tissue elements. Elastic fibers or yellow fibers are bundles of proteins found in extracellular matrix of connective tissue and produced by fibroblasts and smooth muscle cells in arteries. Elastic cartilage or yellow cartilage is a type of cartilage present in the outer ear, larynx, and epiglottis. The three types of cartilage there are three types of cartilage. See more ideas about anatomy and physiology, physiology and histology slides. Elastic cartilage elastic cartilage is very cellular note the abundant chondrocytes throughout this tissue. May 20, 2020 connective tissue is mainly a supporting tissue that binds and supports organs and the body as a whole. In this case, instead of being labeled as loose connective tissue, areolar connective tissue would fall under this category, along with adipose fat connective tissue. Elastic fibers and cell nuclei are stained black, collagen fibers are stained red and other tissue elements including cytoplasm are stained yellow. Elastic fibers are the important resilient component of mammalian connective tissue, and their presence is necessary for the proper structure and function of the cardiovascular, pulmonary, and intestinal systems.
Elastic fibers include elastin, elaunin and oxytalan elastic tissue is classified as connective tissue proper. The extracellular substance of elastic connective tissue is composed of limited ground substance and is structured in a flexible, but firm matrix. Fibro is found in invertebral discs, joint capsules, ligaments elastic is found in the external ear, epiglottis and larynx. The internal elastic membrane forms a boundary between the thin tunica intima and the middle layer, the thick tunica media. The sheets formed by this tissue occur in the walls of blood vessels, lungs, bronchioles, true vocal cords, cartilage of larynx, trachea, capsules of spleen and ligamenta flava which connect adjacent vertebrate. Its matrix has many elastic fibers in addition to type ii collagen. It is thicker and stronger than loose connective tissue and forms a protective capsule layer around organs such as the liver and kidneys. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The thick strands are the collagen fibers, thin strands are the elastic fibers, the small dark purple structures are the nuclei of fibroblast and the granularlooking cell which is a mast cell. This type of cartilage is typically found in their auricle of the ear and the epiglottis. Unlike epithelial tissue, which is composed of cells. Elastic cartilage is histologically similar to hyaline cartilage but contains many yellow elastic fibers lying in a solid matrix.
Oct 12, 2001 loose connective tissue areolar areolar connective tissue. Dense irregular connective tissue, which is made up of elastic fibers and a type of protein fiber called collagen, provides protection to the tissues or organs it surrounds. The arrangement of elastic fiber bundles and loose collagenous connective tissue is more easily seen in the cross section. Fibroblast pale, most common cell collagenous fibers pink, in masses. Adipose connective tissue 400x the bar labeled a indicates the width of one adipose cell adipocyte. Its cellular content is highly abundant and varied. Dense connective tissue, is one of the types of connective tissue also. Elastic cartilage, which is yellow in appearance, is more pliable the third type, called. All of the above are fibers found in connective tissue. See more ideas about histology slides, anatomy and physiology and physiology. Here is a labeled view of loose areolar connective tissue. Elastic tissue is classified as connective tissue proper. The lungs and arteries have a layer of elastic connective. Here is superficial fascia showing collagen fibers.
Jan 28, 2020 dense connective tissue is composed of large amounts of closely packed collagenous fibers. Although it is the most abundant and widely distributed of the primary tissues, the amount of connective tissue in a particular organ varies. Elastin is the protein that allows for tissue to regain its shape after being compressed or warped. Areolar connective tissue is soft and gel like with some elasticity and holds interstitial fluid which carries and delivers nutrients or waste.
This type of tissue is particularly common in areas of the body. May 19, 2020 dense irregular connective tissue, which is made up of elastic fibers and a type of protein fiber called collagen, provides protection to the tissues or organs it surrounds. The extracellular matrix found in elastic tissue is made out of only a limited amount of ground substance. The ecm is composed of a moderate amount of ground substance and two main types of protein fibers. Most other ligaments do not have a preponderance of elastic fibers, and are similar to tendon in composition, although not as regularly arranged. Other components include collagen fibers c and elastic fibers ef read more about loose connective tissue, 40x. If you would like a large, unwatermarked image for your web page or. If you would like a large, unwatermarked image for your web page or blog, please purchase the appropriate license. Reproductive system and necessary life functions 32 terms. Elastic cartilage is very cellular note the abundant chondrocytes throughout this tissue. It is comprised of cells and extracellular matrix, including fibers and ground substance. This section of elastic connective tissue is from the wall of the aorta.
In this micrograph of loose connective tissue of the tracheal mucosa numerous labeled cells of the connective tissue are present. Lab notes home page kentucky community and technical. Elastic fibers differ from collagen in the ease with which they stretch and recoil. 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. Ct7 18 loose connective tissue lamina propria of tracheal mucosa webscope imagescope loose connective tissue. Adipose tissue, connective tissue consisting mainly of fat cells adipose cells, or adipocytes, specialized to synthesize and contain large globules of fat, within a structural network of fibres. In this micrograph of loose connective tissue of the tracheal mucosa numerous labeled cells of. General connective tissue is either loose, or dense, depending on the arrangement of the fibres. This type of tissue is particularly common in areas of the body where multidirectional force is frequently exerted. Hyaline cartilage trachea, 100x hyaline cartilage, total mag.
As may be obvious from its name, one of the major functions of connective tissue is to connect tissues and organs. The elastic fiber is formed from the elastic microfibril consisting of numerous proteins such as microfibrillarassociated glycoproteins, fibrillin, fibullin, and the elastin receptor and amorphous elastin. Elastic connective tissue, as the name implies, helps the body maintain homeostasis by regulating blood pressure and helping the body exhale normally. Areolar connective tissue has similar components as dense irregular connective. This not to be mistaken for elastic cartilage which also is a connective tissue, but under the. Like to the timber framing of a house, the connective tissue.
It is found mainly under the skin but also in deposits between the muscles, in the intestines and in. It contains elastic fiber networks and collagen fibers. Connective tissue an overview sciencedirect topics. Note that these elastic fibers are much thicker than those of loose c. The light purple dots you see inside the cells are an artifact of process used to make the images, and do not represent real structures. Difference between loose and dense connective tissue. Identify and distinguish between the types of connective tissue. Elastic fibers include elastin, elaunin and oxytalan.
Hyaline most common, found in the ribs, nose, larynx, trachea. Which of the following is not a fiber found in connective tissue. The threadlike fibers labeled e are elastic fibers. Loose connective tissue lct, also called areolar tissue, belongs to the category of connective tissue proper. Loose connective tissue areolar areolar connective tissue.
It is labeled this due to its intense concentration of elastic fibers in the extracellular matrix. Areolar connective tissue definition, location, function. Conversely, the elastic component allows an elastic stretch, or temporary elongation, with the tissue. In this photo of areolar connective tissue, nuclei of cells are stained but the cytoplasm is pale and not distinguishable.
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