To recognize smell snakes use their ___

The nerves through which messages travel from the eyes to brain are

The screen in the eyes on which images are formed is

 The sense organ which helps us identify colours is 

The script used by the blind to read and write is 

The organs which help us to hear are _____

We can identify sweet taste from  ___ part of the tongue.

 Chameleons can move their eyes in _____ different directions

The sense organ in which the nerve endings are sensitive to heat, cold is

The largest external organ of our body is