3. They give elastic cartilage great flexibility so it can withstand repeated bending. There are three major types of cartilage: hyaline cartilage, fibrocartilage, and elastic cartilage. Elastic cartilage, which is yellow in appearance, is more pliable than the other two forms because it contains elastic fibres in addition to collagen. Elastic cartilage is sometimes confusingly referred to as fibroelastic cartilage (this is confusing because there is another type of cartilage called fibrocartilage). The function of elastic cartilage, in this case, is therefore to spring back into a closed form upon the relaxation of this muscle, as such a narrow but important feature must be stable enough to retain its shape, and must be elastic enough to change it. On either side of the cartilage are the paler perichondrial layers. The extracellular matrix of all types of cartilage binds with water (osmotic effect) due to the action of Aggrecan, the predominant proteoglycan of cartilage. The ECM of elastic cartilage contains elastin, fibrillin, glycoproteins, collagen types II, IX, X and XI, and (predominantly) the proteoglycan Aggrecan. Another important purpose of cartilage is to cover the surfaces of joints, allowing bones to slide over one another, thus reducing friction and preventing damage; it also acts as a shock absorber. Elastic cartilage is the most flexible, which means it contains the most chondrocytes. This osmotic effect produces a flexible but firm gel. Elastic cartilage function is two-fold: to change cartilage shape in response to tension, compression, and bending before returning to an at-rest state, and to provide a strong but flexible structure. These fibers give elastic cartilage great flexibility so that it is able to withstand repeated bending. This fiber type distinguishes elastic cartilage from all other forms. The Eustachian tube (pharyngotympanic tube/auditory tube) is a narrow tube of approximately 3mm wide. Elastic cartilage, fibrocartilage, and hyaline cartilage can all be damaged. Within the outer ear , it provides the skeletal basis of the pinna, as well as the lateral region of … Biologydictionary.net Editors. Cartilage: elastic description. This allows the cartilage to spring back into the original position (into a relaxed state). These components are produced by the chondroblasts at the inner edges of the perichondrium, and are located in an environment that is gel-like. I used to publish this type of article in regular basis in this site. The elastic fibers within the ECM of elastic cartilage are this tissue’s defining characteristic. The chondrocytes lie between the fibres. Elastic cartilage function is two-fold: to change cartilage shape in response to tension, compression, and bending before returning to an at-rest state, and to provide a strong but flexible structure. Chondrocytes lie between the fibers. Elastic cartilage locations are varied. I had laryngitis after yelling during a ballgame the previous night. elastic cartilage n. A yellowish flexible cartilage in which the matrix is infiltrated by a network of elastic fibers; it occurs primarily in the external ear, eustachian tube, and some cartilages of the larynx and … Elastic cartilage is also found in the corniculate and cuneiform cartilages of the larynx, where the joints they create allow for the movement of the vocal chords and play a role in voice quality and pitch. [1] The principal protein is elastin. Collagen fibers are also found within the perichondrium; the outer layer is more collagen-rich. 8 Terms. Cartilage is a sturdy, elastic sort of connective tissue exist within a human body. Hope, you have got the basic idea about cartilage histology along with hyaline cartilage histology, hyaline cartilage function, cartilage function, cartilage ppt, elastic cartilage histology, fibrocartilage histology, costal cartilage histology and others. Function #1. Chondrocyte in lacuna and matrix- white ball eye and sometimes…. Elastic cartilage also contains a perichondrium, which covers the cartilage. The image below shows an epiglottis at rest. Hyaline Cartilage. Stretching them creates uniformity which is once again lost when the tensile pressure is released. Elastic Cartilage. Elastic Cartilage Function. It is found in the epiglottis (part of the larynx), the pinnae (the external ear flaps of many mammals). Elastic or yellow fibers are composed of elastin proteins which co-polymerize with another protein type – fibrillin – forming fiber-like elastic chains. Which of these cell types is not part of elastic cartilage? Hyaline cartilage is the most widespread cartilage type and, in adults, it forms the articular surfaces of long bones, the rib tips, the rings of the trachea, and parts of the skull. Retrieved from https://biologydictionary.net/elastic-cartilage/. Elastic cartilage looks very similar to hyaline cartilage under a microscope, and special stains must be used to show the otherwise invisible elastic fibers that give this particular cartilage type its name. Epiglottis Elastic Cartilage. Other articles where Elastic cartilage is discussed: cartilage: Elastic cartilage, which is yellow in appearance, is more pliable than the other two forms because it contains elastic fibres in addition to collagen. It is usually recognizable by its dull yellow color. The white vocal chords of the larynx can be seen at the edges of the dark hole of the trachea. This effect can also be achieved through nose blowing or yawning, as during these actions the Eustachian tube opens and allows air to enter into the middle ear, reducing the difference between middle ear and atmospheric pressures. On most slides, the elastic fibers [3] stain with a darker stain so you can see the elastic network that is formed. Under the microscope (histologically) elastic cartilage and hyaline cartilage look very similar, other than the many yellow fibers that are found in … It contains elastic fiber networks and collagen type II fibers. Elastic cartilage is found in the ear and epiglottis (located in the throat) as well as parts of the nose and trachea. There is no type I collagen in elastic cartilage. It is similar to hyaline cartilage and has yellow elastic fibers that make it very flexible. Elastic cartilage function is two-fold: to change cartilage shape in response to tension, compression, and bending before returning to an at-rest state, and to provide a strong but flexible structure. Its role is to give shape and support to these areas. Function: Maintains the shape of … The elastic cartilage of the larynx helps move the vocal cords so we can make sounds. Fun Fact! When you have inflamed vocal cords, though, even the cartilage can't help you get a word out. Elastic Cartilage can be found in the framework of the external ear and parts of the larynx. Elastic cartilage has a structural and functional purpose in this case, as the narrow tube must return to its original, at-rest form (closed) when free from the tensile forces of the tensor veli palatini muscle. These fibers give elastic cartilage great flexibility so that it is able to withstand repeated bending. If the outer ear was fleshy, the folds of the pinna which modify sound waves before funneling them through to the middle ear would not keep their form and work less efficiently. Swallowing during take-off or landing often causes the ears to ‘pop’. similar to hyaline cartilage, but more elastic fibers in matrix. The chains of glycosaminoglycan (GAG) that are part of the Aggrecan structure attract water and produce the lubricating and shock-absorbing qualities of cartilage. The outer ear is relatively unprotected and sticks out from the skull. 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