CHAPTER IV. 



SYNTHESIS OF ORGANS INTO APPARATUS, AND OF 

 USES INTO FUNCTIONS. 



Introductory . 



1182. Remark, A REVIEW OF THE ORGANS WILL SUGGEST that they 

 act together hi ten classes to accomplish ten results. Each class is 

 called an apparatus, and each result a function. 



1183. Remark. THOUGH EACH ORGAN HAS BEEN FOUND TO BE CON- 

 STRUCTED IN PART OF BLOOD-VESSELS, when the organs are classed as 

 apparatus, the blood-vessels are considered as parts of the circulatory 

 apparatus superadded to other apparatus. 



SECTION I. 

 Motion: Motory Apparatus. 



1184. THE PRODUCTION OF MOTION REQUIRES a gan- 

 glion to produce, a nerve to transmit, and a muscle to 

 receive, nervous influence, and usually some parts of a 

 skeleton for the attachment of muscles. 



1185. All the muscles of the body, their connecting 

 nerves and appropriate ganglia, with the entire skeleton, 



CONSTITUTE A GRAND MOTORY APPARATUS. (PI. 1, 2, 3, 



and Figs. 1, 2, 3, PL 6.) 



1186. THE MOTORY APPARATUS is SUBDIVIDED into 

 voluntary, or that over which the mind has control, and 

 involuntary, or that which the mind does not control. 



1187. Inf. THE LATTER are included in the different kinds of 

 Blood-making apparatus. 



1188. Remark. THE MUSCLES UNDER THE INFLUENCE OF THE MIND 

 OUGHT TO ACT INVOLUNTARILY at various times, as when the action of 

 one muscle or group of muscles is necessarily, or by habitual action, 

 associated with that of another. 



1182. What will ? 1183. how considered ? llSi. What does ? 1185. What 

 necessary to - ? Describe Pis. 1, 2, 8, and Figs. 1, 2, 8, of PI. 6. 1186. How is ? 



