Lets try your Understanding

Exercises

Figure 1 show the structure of the human eye.

Figure 1

a)      Label the structure of the eye with the following words: 
·         retina 
·         lens 
·         blind spot
·         yellow spot
·         pupil 
·         iris                     

b)      State the function of 
·         cornea 
·         ciliary muscles 
·         aqueous humour 
·         sclera

c)      What is a blind spot?

Figure 2 shows the cross-section of the human ear.

Figure 2

a)      Label the structure of the ear: 
1.      ______________________ 
2.      ______________________ 
3.      ______________________ 
4.      ______________________ 
5.      ______________________ 
6.      ______________________

b)      State the function of the

·         semicircular canals

·         Eustachian tube

·         cochlea

Figure 3 shows the structure of the human skin.

Figure 3

a)      Label the structure of the ear: 
1.      ______________________ 
2.      ______________________ 
3.      ______________________ 
4.      ______________________ 
5.      ______________________ 
6.      ______________________ 
7.      ______________________ 
8.      ______________________ 
9.      ______________________ 
10.  ______________________ 
11.  ______________________

*Remember to try first before you refer to the notes given.
  Check your answer from the notes given in front.