elastic cartilage function

These chondrocytes are surrounded by the extracellular matrix crisscrossed by a darker, fibrous network of collagen and elastin fibers. Elastic Cartilage. This is the type of cartilage found in your ear. Within the outer ear , it provides the skeletal basis of the pinna, as well as the lateral region of … It contains elastic fiber networks and collagen type II fibers. 2. The perichondrium is made up of two differently functioning layers: the inner layer contains chondroblasts (chondrocytes which are not yet fixed within the extracellular matrix, and which continue to produce the components of this thick gel-like substance). In elastic cartilage, also referred to as yellow elastic cartilage, the matrix is dominated by a dense network of elastin fibres (Figure 4.17).Elastic cartilage provides support with moderate elasticity. 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. The upper flap of the epiglottis covers the entrance to the esophagus, which lays posterior to the trachea. There are three major types of cartilage: hyaline cartilage, fibrocartilage, and elastic cartilage. Swallowing during take-off or landing often causes the ears to ‘pop’. Chondrocytes within the cartilage only make up to 2% of total tissue volume. 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. Elastic cartilage is histologically similar to hyaline cartilage but contains many yellow elastic fibers lying in a solid matrix. These fibers form bundles that appear dark under a microscope. In humans it makes up the external ear, the auditory tube of the middle ear, and the epiglottis. The chondrocytes lie between the fibres. Chondrocytes and ECM are contained within an outer layer known as a perichondrium. On either side of the cartilage are the paler perichondrial layers. Function #2. It is the most pliable and stretchable of all the three types of cartilage. The white vocal chords of the larynx can be seen at the edges of the dark hole of the trachea. Its matrix has many elastic fibers in addition to type II collagen. It is usually recognizable by its dull yellow color. These fibers form bundles that appear dark under a microscope. The main function of elastic cartilage is to provide strength and elasticity to a structure while maintaining the shape. Allows Vibration- The cartilage of larynx (voice box) vibrates during speech and singing. Elastic Cartilage can be found in the framework of the external ear and parts of the larynx. A clear distinction can be felt in the ear lobes, which have no cartilage, in comparison to the cartilaginous pinnae. Elastic cartilage, fibrocartilage, and hyaline cartilage can all be damaged. It is found mainly in the larynx, the external part of the ear (pinna), and the tube leading from the middle part of the ear to the throat (eustachian or auditory tube). ; Elastic - is found in the external ear, epiglottis and larynx. Biologydictionary.net Editors. Elastic cartilage or yellow cartilage is a type of cartilage present in the outer ear, Eustachian tube and epiglottis. Support - Elastic cartilage also strengthens and supports these structures. 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. This fiber type distinguishes elastic cartilage from all other forms. It is found in the epiglottis (part of the larynx), the pinnae (the external ear flaps of many mammals). It is more flexible than hyaline cartilage. Cartilage is a resilient and smooth elastic tissue, a rubber-like padding that covers and protects the ends of long bones at the joints and nerves, and is a structural component of the rib cage, the ear, the nose, the bronchial tubes, the intervertebral discs, and many other body components. “Elastic Cartilage.”, Biologydictionary.net Editors. Elastic or yellow fibers are composed of elastin proteins which co-polymerize with another protein type – fibrillin – forming fiber-like elastic chains. Epiglottis Elastic Cartilage. The aneural and avascular properties of cartilage mean that it is unlikely that one is woken up if the ear is folded when being slept on. The other prominent anatomical sites composed of elastic cartilage are the epiglottis, Eustachian tube, and corniculate and cuneiform cartilages of the larynx. 3. Elastic cartilage is histologically similar to hyaline cartilage but Forms structures associated with the ear : (a) Pinna (outer ear) (b) Wall of external auditory meatus (canal) Forms the epiglottis : covers the opening of trachea when swallowing. Function: Maintains the shape of … At rest, the epiglottis is upright. Cartilage – Introduction, Structure, Formation And Types Of Cartilage 8 months ago Drishti Sharma Introduction Cartilage is a connective tissue found in various parts of the adult skeleton including… These components are produced by the chondroblasts at the inner edges of the perichondrium, and are located in an environment that is gel-like. The other two types of cartilage – hyaline and fibrous – are white in appearance. Elastic Cartilage Function. If the outer ear were made of bone, ear fractures would be regular occurrences. The extracellular matrix of elastic cartilage contains higher levels of type II collagen. Elastin fibers stain dark purple/black with Verhoeff's stain. The elastic fibers within the ECM of elastic cartilage are this tissue’s defining characteristic. Biologydictionary.net Editors. The collagen fibers similarly form a network which provides strength and a structural framework for other molecules within the ECM. The Extracellular Matrix of Elastic Cartilage, Ability to spring back into an original position, and to provide a shock-absorbent, low friction environment, Ability to convert chondroblasts into fibroblasts. This action prevents saliva and food from entering the airway, where choking and aspiration pneumonia may be the result. Costal cartilages that connect the ventral ends of the ribs to the sternum increases elasticity of the chest wall In this case, elastic cartilage has a protective and structural function. 8 Terms. Other noncollagenous proteins contain GAGs that bind with cytokines or help organize the extracellular matrix. 1. Cartilage is a sturdy, elastic sort of connective tissue exist within a human body. Cartilage: The three types of cartilage There are three types of cartilage: Hyaline - most common, found in the ribs, nose, larynx, trachea. My voice turned hoarse after the game, but when I woke up in the morning, it was completely gone. 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. 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. 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. It is similar to hyaline cartilage and has yellow elastic fibers that make it very flexible. Hence, this cartilage can be found in the ear, epiglottis, and larynx. Elastic Cartilage What is its function? Elastic cartilage, also called yellow cartilage, is found in the outer ear, the Eustachian (auditory) tube, and the epiglottis, which is the tissue that separates the trachea and the esophagus. In humans it makes up the external ear, the auditory tube of the middle ear, and the epiglottis. Cartilage: elastic description. 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