Page 2 - CH-8-8.5 MUSCLES

 MUSCLES

 The movement of our body does not take place because of bones alone.
Muscles also play a significant role.
 Muscle is a fibrous tissue in the body which has ability to contract.
 Some muscles are attached to the bones. When these muscles contract
and relax, they help the bones to move.
 Muscles are attached to the bones with the help of tissues called
tendons.
 Muscles which are not attached to our bones help in various life

processes such as digestion, respiration and circulation.

 TYPES OF MUSCLES

There are mainly 3 types of muscles found in our body:

1. Voluntary muscles
 The muscles whose movement is under our control are known as
Voluntary muscles.
 We can control the movement of the muscles attached to our skeleton
as per our will. Hence, these are voluntary in nature.
 They are also known as skeletal muscles because all of the muscles

attached to the skeleton.

2. Involuntary muscles
 The muscles whose movement is not under our control are known as
involuntary muscles.
 For example, the muscles in the walls of the stomach, intestine and

lungs function on their own. These muscles are therefore involuntary in
nature.
 They are also known as smooth muscles.

3. Cardiac muscles
 These muscles are present only in our heart. They contract and relax
continuously.