Which fiber type is characteristic of elastic cartilage?

Which fiber type is characteristic of elastic cartilage?

• A. Reticular fiber
• B. Elastic fiber
• C. Collagen type I fiber
• D. Collagen type II fibril

Answer: (B)

Elastic cartilage is defined by a network of elastic fibers in its extracellular matrix, made of elastin, which gives the tissue the ability to bend and snap back to shape. This elasticity, in addition to the usual type II collagen framework, allows structures like the external ear and epiglottis to be flexible. Reticular fibers aren’t a hallmark of cartilage, and collagen type I fibers are more associated with fibrocartilage, which is tougher and less elastic. Collagen type II fibrils are present in most cartilage, but the distinctive feature of elastic cartilage is the presence of elastic fibers.

Elastic cartilage is defined by a network of elastic fibers in its extracellular matrix, made of elastin, which gives the tissue the ability to bend and snap back to shape. This elasticity, in addition to the usual type II collagen framework, allows structures like the external ear and epiglottis to be flexible. Reticular fibers aren’t a hallmark of cartilage, and collagen type I fibers are more associated with fibrocartilage, which is tougher and less elastic. Collagen type II fibrils are present in most cartilage, but the distinctive feature of elastic cartilage is the presence of elastic fibers.