(a) List important difference between tendons and ligaments. (b) Which protein forms dense, hard matrix of bone ? (c ) What is meant by decalcified bone ? (d) Name two long bones present in human body. These bones have a cavity in the centre. What is it called ?

(a) List important difference between tendons and ligaments. (b) Which

1.	(a) List important difference between tendons and ligaments. (b) Which protein forms dense, hard matrix of bone ? (c ) What is meant by decalcified bone ? (d) Name two long bones present in human body. These bones have a cavity in the centre. What is it called ?
Answer» (b) Ossein. (c ) If a bone is kept in a dilute acid (5% nitric acid ) for sometime, its inorganic part is dissolved and organic part is left behind. Such a bone is said to be decacified bone. (d) Humerus and femur bones are long bones. These have marrow cavity in the centre.

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(a) List important difference between tendons and ligaments. (b) Which protein forms dense, hard matrix of bone ? (c ) What is meant by decalcified bone ? (d) Name two long bones present in human body. These bones have a cavity in the centre. What is it called ?

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