Question

Give one reason for the following statements :
a. The blood is called connective tissue.
b. Muscles are able to contract and relax to bring about movements.
c. Muscles of heart are called involuntary muscles.

Answer 1

a) blood flows in every part of our body and thus connecting every part of our body and hence blood is known as liquid connective tissue
b)as skeletal muscles contracts and relax as they have special fibres and this bring movement in our body and are known as voluntary muscle
c)muscle of heart are known as involuntary muscle because we can't control them by our own will

Answer 2

I) Blood is considered as a connective tissue because it connects the body systems together bringing the needed oxygen, nutrients ,hormones, other signalling molecules and removes the wastes.

II) Muscles are special fibres which causes moment because of contraction and relaxation the movement of body. The movement of the body and limbs are brought about by contraction and relaxation of contractile proteins which are present in the muscle cells.

III) muscles of heart are called involuntary muscles because the contraction and relaxation of the heart muscles which helps to pump and distribute the blood is involuntary that is it does not work according to our will.