SYSTEMATIC SYNTHESIS OF TISSUES INTO ORGANS. 331 



953. THE LYMPHATIC TUBES APPEAR beaded or with 

 numerous enlargements (B, Fig. 2 IT), owing to the 

 valves within, as shown by (7, a lymphatic laid open 

 and enlarged. 



954. THE LYMPHATICS EXTEND nearly parallel (See 

 PI. 5*), and are very uniform in size, opening together 

 without forming a larger trunk, several leading into a 

 gland, from which a smaller number issue, and all at last 

 opening into veins. 



955. THE CONTENTS OF THE LYMPHATICS, the lymph, 

 appears like the watery or serous part of the Blood, and 

 seems to be that portion gathered from the various tis- 

 sues, into which it has passed from the red capillaries, 

 and by which it has not been used. 



956. THE USE OF THE LYMPHATICS SEEMS TO BE to 

 gather the lymph and pour it into the glands, which ap- 

 pear to have the office of originating the Blood-cells, or 

 the cells from the nuclei of which the Blood-cells are 

 produced. 



957. Remark. THE LYMPHATICS ABOUND in all parts of the body 

 except the brain and nerves, in the substances of which they have not 

 been detected ; and this fact may assist in determining additional facts 

 in regard to both the brain and lymphatics. 



SECTION VH. 



Respiratory Organs. 



958. THE RESPIRATORY ORGANS INCLUDE air-passages 

 to the lungs, the lungs, and the walls of the trunk, in- 

 cluding the diaphragm. 



959. THE PASSAGES LEADING TO THE LUNGS INCLUDE 

 the nose (and incidentally the mouth), the pharynx, the 

 larynx, the trachea, and the commencement of the bron- 

 chii. 



960. THE NOSTRILS ARE INTENDED FOR the passage 



953. How do ? 954. How do ? Describe Figs. 92, 93. 955. What said of ? 

 956. what ? 95T. Where do ? 958. What do ? 959. What do ? 960. what ? 



