202 DETAILED SYNTHESIS. 



constructed ; how they are brought into action, whether 

 singly, successively, or combinedly; and the result of 

 such action. 



259. It WILL ALSO BE A SUBJECT OF INQUIRY wheth- 

 er an organ acts singly, successively, or combinedly, 

 and what relations it has with other organs. 



260. THE GENERAL APPEARANCE OF THE ORGANS 

 must also be described, their color, size, form, surface, 

 and position ; which last point indicates the organs to be 

 first described, since there is but one class of organs the 

 positions of which can be independently described, and 

 to which also the position of all the rest can be conveni- 

 ently referred. 



SECTION I. 

 Skeleton. 



261. THE SKELETON is REQUIRED, as a framework 

 from h6ad to foot, to be strong as a support and protec- 

 tion, yet light, that it may be easily carried, and con- 

 structed with many joints, that it may be flexible. Its 

 surface must be sufficiently extended to allow all parts 

 a proper attachment to it, yet not so great as to be un- 

 wieldy or unsightly. 



262. ALL THE DESIRED RESULTS ARE MOST PERFECT- 

 LY ATTAINED by the appropriate use of four tissues: the 

 Bony, to construct the hard part ; the Gristly, to give 

 elasticity and a perfect finish to the joints, and to form 

 the entire frame of some parts ; the Sinewy, to bind all 

 parts snugly together, and to sheathe the bones and car- 

 tilages ; and the Secretory, to secrete a fluid (Synovial) 

 to prevent friction at the joints. 



{Bones. 

 5; 

 Synovial Membranes. 



259. What ? 260. What said ? Subject of Section II. 261. Why f 

 262. How ? Table. 



