NERVES, GLANDS, SECRETION. 215 



inside of the mouth. The lachrymal, or tear, 

 gland is concealed in the orbit of the eye. When 

 we weep, it secretes very copiously. 



The tears are carried away through a little 

 opening, which may be seen at the inner corner 

 of the lower eyelid. This is the orifice, or mouth, 

 of a duct leading into the nose, and hence called 

 the nasal duct. 



The secretions are very much under the influ- 

 ence of our feelings : thus, when we are in sor- 

 row, we shed tears almost in spite of ourselves ; 

 and if we suffer severe pain, the same thing occurs 

 unless we are very determined. 



Questions. 

 



What do nerves look like t 



With what parts are they all connected ? 



How is it that they become smaller and smaller 1 



How do they terminate 1 



By what means do we know that our bodies are full of 

 nerves 1 



What is it that nerves enable us to do ? 



What happens if the nerves of the tongue or finger are 

 divided ? 



Where may glands be felt at times ? 



What is meant by a secretion, and from what is it pre- 

 pared ] 



Mention one or two secretions. 



How are the tears carried away from the eye ? 



Are the secretions much under the influence of our feelings ? 



