Question

The structural unit of bone is
A)Chondrin
B)Cyton
C)Osteon
D)Ossein

Answer 1

A bone is a rigid organ which makes up part of the vertebrate skeleton. Bones provide protection to organs, generate red and white blood cells, store minerals, provide the body with structure and support, and allow mobility.

Complete answer:
Let us analyze the options to find out the correct option.
Option A: Chondrin is bluish white gelatin like matrix in which cells of the connective tissue cartilage are embedded in. It is a protein carbohydrate complex. Therefore, this is an incorrect option.
Option B: Cyton is the central body of the neuron which contains the nucleus except the cell processes. Therefore, this is an incorrect option.
Option C: Osteon is the structural unit of bone composed of concentric layers of bone called lamellae forming a long hollow passageway, the Haversian canal. Therefore, this is the correct option.
Option D: Ossein is the incorrect option.

The individual bone cells are called osteocytes.
The Harvesian canal has small blood vessels which supp;y blood to osteocytes.
Osteon formation takes place during bone remodelling.

Hence, the correct answer is option (C)

Note: 1.Osteons are 0.2mm in diameter and can be several millimetres long.
2.Osteon are parallel to the bone’s long axis.
3.Interstitial lamellae fills the space between adjacent osteons.