Which  helps us to know about the outside world?

Which part of human eye lets light into the eyes?

We speak with the help of our:

We smell with help of our :

Which helps us to see?

How long does it take for the eyes to adjust to darkness?

Thin tubes that carry blood to all parts of our body are called:

Which helps  us to stand, walk and move?

Which forms the largest part of human brain?

How many types of nerves are there in human body?