The inverted image of an object is formed on

The outer part of the ear is

 To recognize smell snakes use their ___

The largest external organ of our body is

The screen in the eyes on which images are formed is

 Chameleons can move their eyes in _____ different directions

The script used by the blind to read and write is 

The organs which help us to hear are _____

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

 The sense organ which helps us identify colours is