--- is the inside parasites among animals

--- is the hardest part of the human body

Carnivores have --- teeth which can tear off food.

Small intestine is about --- metre long.

Peristalsis is ---

--- is the process in which absorbed components become part of the body.

The condition of excessive loss of water and salts from the body is called ----

Urine contains ---% water

Children should drink at least ---litre water daily.