There are _____________ muscles to control the movements of each eye.

How much bile is secreted by liver per day?

Which is the largest internal organ?

The _________system gives shape and support to the body.

Energy for the body growth is obtained from

The __________carry blood from the heart to different parts of our body.

The brain is protected inside the 

Air sacs in the lungs are called

Undigested food excreted through _________

Intestines includes the ____________ system.