HITCHCOCK'S A N A T O M Y 



into Proteine, a substance, however, which does not exist in 

 nature, but results from the decomposition of the principles 

 above named. 



HISTOLOGY. 



36. Organic and Inorganic Structure. — Animals and 

 plants have a structure different from that of minerals when 

 we examine them with the microscope. The former is called 

 Organic, and the latter Inorganic Structure. 



37. Vitality the Cause of Organization. — Vitality, or the 

 principle of life, or the Vital Force, is the cause of organi- 

 zation. The nature of life is indeed involved in obscurity ; but 

 its effects are manifest, and among them is organization : al- 

 though some have maintained, but without good reason, that 

 the vital force is nothing but a peculiar manifestation of heat, 

 mechanical force, chemical action, galvanism, etc. 



38. Elementary and Primary Tissue. — The simplest forms 

 of organized structure are three. 



1. Simple Membrane. 



2. Simple Fiber. 



3. Cells. 



These organic forms physiologists denominate Elementary 

 Tissue. When united, they form Primary Tissue. 



39. Histology; Proportion of Tissues in the Body. — 

 Histology is the science of Tissues. Tissue forms nearly the 

 whole of the solid portions of the body. By means of the mi- 

 croscope, they have been examined with great care, and de- 

 scribed. 



40. Fluids of the System; Hy grology . — Before entering 

 upon a description of the tissues, it seems desirable, at least, 

 to enumerate the different fluids found in the system, though a 



36. Define organic and inorganic structure. 37. Give the cause of organization. 

 3S. State the three simple forms of organized structure. What is Elementary Tissue? 

 "What is Primary Tissue? 39. Define Histology. What forms the solid parts of the 

 body ? 40. What is Hygrology ? 



