SYSTEMATIC ANALYSIS OF APPARATUS. 103 



370. IN MAN, Lymphatics are also required. They 

 are a system of tubes and glands, commencing in every 

 organ except the brain and nerves, and opening into 

 veins. Why the veins cannot take up all the substance 

 they contain is not known. It may be that it requires a 

 peculiar modification, and if all the glands necessary 

 should be in one mass it would find no convenient place 

 in the Body, and therefore they have been distributed 

 for convenience of packing, and their tubes have been 

 adapted to bring to them substances adapted to their 

 action. They are attachments to the veins, and gather 

 into them the lymph, modified by their action, therefore 

 the 



B. CnumAWET OB*A= 



SECTION VI. 



Nervous Circulatory Organs. 



371. IT is EASY TO CONCEIVE that it will be very 

 important, even essential, to have some means of con- 

 trolling the circulation of Blood, now quickening, now 

 slackening it, both as to the whole Body and as to each 

 part through which it moves. 



372. THE CIECULATION MUST GO ON and be reg- 

 ulated during sleep, as well as during waking hours, and 

 must, therefore, as well as for other reasons, not be 

 directly under the control of the Mind. 



373. THERE is NO MEANS OF CONTROLLING THE CIR- 

 CULATION except by ganglia (of which the case would 

 require many) and nerves, and these must be indirectly 

 connected with the Brain and Mind. (See PI. 3*.) 



374. THIS CLASS OF NERVES is CALLED the Ganglionic 

 system, its ganglia being so numerous ; the Sympathetic 

 system, since it was supposed to weave together all parts 



3TO. What required also ? What said of them ? Write table. 371. What ? 

 872. When ? 373. What is said of the ? 374. What is ? 



