AND PHYSIOLOGY. 



15 



fuller description of them will be given farther on. Thesa 

 fluids contain the elements of the tissues. That part of 

 anatomy which treats of them is called Hygrology. 



41. Lymph. — Lymph, a transparent, coagulable fluid, in 

 the lymphatics, emptying into the blood. 



42. Chyle. — Chyle, a white, coagulable fluid, derived from 

 the food in the intestines, and conveyed to the blood. 



43. Blood. — Blood, in the veins and arteries, from which 

 nearly all the parts of the system are sustained, a coagulable 

 fluid, with an alkaline reaction. 



44. Scrum. — Serous secretions, fluids found on various 

 serous membranes, as the pleura, peritonaeum, pericardium, 

 and membranes of the brain and ear. 



45. Transudations, — Transudations, vapor from the lungs, 

 and sometimes from the skin ; also, fluids in some of the tis- 

 sues, more especially in certain diseases, as dropsy in the 

 head, chest, and abdomen, certain sweats and discharges in 

 cholera, etc. 



46. Exudations. — Exudations, 1 1 any organizable fluid 

 spontaneously separated from the blood vessels, without rupt- 

 ure of their walls,' 7 chiefly occurring in inflammations, and 

 wherever new material is required for repair of the system. 

 The pus of wounds and sores is an example of exudation. 



47. Mucus.— Mucus, a viscid mass capable of being drawn 

 into threads, secreted from the mucous membrane, but differ- 

 ing in different parts. 



48. Gastric Juice and Pepsin. — Gastric fluid, a fluid 

 secreted by the stomach, containing a substance called Pepsin, 

 which aids in digestion. It contains a little free chlorohydric 

 and lactic acids. 



41. What is Lymph and what becomes of it? 42. Define Chyle and state what be- 

 comes of it. 43. Define the blood. 44. What membranes secrete the serum ? 45. Define 

 transudations. In what diseases do they occur? 46. What are exudations? When are 

 they serviceable? 47. What does the mucous membrane secrete? 4S. Define and de- 

 scribe the secretions of the stomach. 



