ELEMENTS OF PHYSIOLOGY 



in the world were dumped into the sea it would be a great 

 deal better for mankind and a great deal worse for the 

 fishes. 



607. THOUGHT LESSON. How the Body shows that God 

 is Good. 



1. Name six beneficent natural provisions for repair of 

 accidental or unusual injuries to the body. 



2. State six facts in anatomy showing provisions for 

 protection. 



3. State six similar facts in physiology. 



4. Name four anatomical provisions for convenience in 

 use. 



5. Name four devices used in machinery, examples of 

 which occur in the body. 



6. Name three devices of architecture found in the 

 body. 



7. Why have the ears, eyes, nose, and mouth been 

 assigned the positions relative to one another which they 

 occupy in the head ? 



SIGHT 



608. By the use of the senses thus far studied, we 

 learn almost nothing of the external world except by 

 actual contact. Sight and hearing tell us of objects at 

 a distance. Without the eye the body is comparatively 

 helpless. 



609. The Orbit (Fig. 51). The deep bony socket in 

 which the eye rests is called the orbit. Its walls are formed 

 by inward processes of the frontal, malar, and several other 

 bones. There is an opening in the deepest part of the 

 socket for the entrance of the optic and oculo-motor nerves, 

 and the blood vessels that supply the eye ; the deep portion 

 of the orbit is partly occupied by a cushion of fat upon 

 which the eyeball rests, and which yields to some extent 

 when the eye is struck. 



