Write the important functions of water in our body.

Write one important function of the backbone.

Enumerate the main functions of skeletal system in our body.

Write the importance of synthetic polymers in our life.

State the function of receptors in our body. Think of any three situations where receptors in the body do not work properly. Mention the problems which are likely to arise.

What is the importance of measuring BOD of a water body ?

Define BOD. What is the importance of measuring BOD of a water body?

Give four important functions of epithelial tissue. Name one specific place in the body where each function is carried out.