Elastic cartilage contains, in addition to collagen, fibers of the protein elastin. This makes it firm yet supple, giving support, for example, to the external ear and epiglottis.
Fibrocartilage is made up of tightly packed bundles of collagen fibers, making it resilient and able to withstand compression. Fibrocartilage lies, for example, between vertebrae.
Three Kinds of Cartilage video from youtube
Showing posts with label cartilage types. Show all posts
Showing posts with label cartilage types. Show all posts
cartilage structure video
cartilage 3 types
Cartilage, unlike other types of connective tissue, has no blood vessels. It is tough but pliant because the ground substance between the cells contains combinations of proteins and sugars. Cartilage is described as hyaline, fibrous or elastic, depending on the density and type of fibers present in its composition. Hyaline, the most abundant type of cartilage, is clear and glassy, with few cells and fibers in the ground substance. Hyaline covers the ends of bones at the joints, and also forms the rings which keep the trachea open. Fibrocartilage is made up of tightly packed bundles of collagen fibers, making it resilient and able to withstand compression. Fibrocartilage lies, for example, between vertebrae. Elastic cartilage contains, in addition to collagen, fibers of the protein elastin. This makes it firm yet supple, giving support, for example, to the external ear and epiglottis.
Cartilage types: a)Hyaline Cartilage
1. Composition
Fibers, Hyaline cartilage matrix contains thin fibrils of type II collagen. Their small size and their refractive index (close to that of the ground substance) make them difficult to distinguish with the light microscope. Type II collagen contains a higher proportion of hydroxylysine than does type I. b. Ground substance, the predominant tissue component, comprises the following: (1) GAGs, mostly chondroitin sulfates and hyaluronic acid, with smaller amounts of keratan sulfate and heparan sulfate
(2) Proteoglycans, core proteins with GAG side chains;
(3) Proteoglycan aggregates proteoglycans covalently linked to long chains of hyaluronic acid by link protein;
(4) Glycoproteins, which attach various matrix components to one another and cells to the matrix, including link protein, fibronectin, chondronectin; and (5) Tissue fluid, an ultrafiltrate of blood plasma.
Fibers, Hyaline cartilage matrix contains thin fibrils of type II collagen. Their small size and their refractive index (close to that of the ground substance) make them difficult to distinguish with the light microscope. Type II collagen contains a higher proportion of hydroxylysine than does type I. b. Ground substance, the predominant tissue component, comprises the following: (1) GAGs, mostly chondroitin sulfates and hyaluronic acid, with smaller amounts of keratan sulfate and heparan sulfate
(2) Proteoglycans, core proteins with GAG side chains;
(3) Proteoglycan aggregates proteoglycans covalently linked to long chains of hyaluronic acid by link protein;
(4) Glycoproteins, which attach various matrix components to one another and cells to the matrix, including link protein, fibronectin, chondronectin; and (5) Tissue fluid, an ultrafiltrate of blood plasma.
THERE ARE 3 TYPES OF CARTILAGE
Hyaline cartilage, elastic cartilage, and fibrocartilage differ in appearance and mechanical proper ties, owing to differences in the composition of their extracellular matrix
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