Question

In the diagram of a section of hyaline cartilage, the different parts have been indicated by alphabets. Choose the correct match.

A)a = Chondrin ; b = Chondrocyte; c = Lacuna; d = Capsular matrix; e = Perichondrium
B)a = Chondrin; b = Lacuna; c = Chondrocyte; d = Capsular matrix; e = Perichondrium
C)a = perichondrium; b = Chondrocyte; c = Lacuna ; d = Capsular matrix ; e = Chondrin
D)a = Capsular matrix; b = Chondrocyte; c = Lacuna d = Perichondrium ; e = Chondrin

Answer 1

Hint: Hyaline cartilage makes up the embryonic skeleton. In adults it is found at the ends of the bones that are free moving, at the ends of the ribs, in the nose, larynx, trachea, bronchi. It contains collagen. The nerves and blood vessels are absent.

Complete answer:
The hyaline cartilage is the glass like translucent cartilage found on the surfaces of the joints. It is found in ribs, nose, larynx, trachea. It is pearl grey in colour and has a substantial amount of collagen.
Structure of hyaline cartilage:

Perichondrium (e): It contains a fibrous membrane which covers the surface of hyaline cartilage.

Chondrin(a)- It is a gel like substance made up of proteins.

Chondrocyte (b): These are the larger and mature cells of cartilage. These cells are rounded or elongated and mix uniformly in the protoplasm.

Lacuna(c): It is the fluid filled space here the cartilage cells or the chondrocytes are present.

Cartilage matrix(d): It is made up of proteoglycan lipid, non-collagenous proteins and the fibres of collagen.

Hence, the correct answer is option (A)

Note: The presence of collagen fibres provides strength to the structures and joints. It restricts the flexibility and mobility of the joints. The hyaline cartilages are the mostly found cartilages. The hyaline cartilages provide mechanical strength to the respiratory channel, nose and the ribs and bones. The presence of fibres makes them less elastic.