282 THE ENGINES OF THE HUMAN BODY 



"Operative" nerve cells or units, 251, 



»59- 

 Optic nerves, 233, 



thalamus, 239, 262. 

 Ossification, 70. 



Osteoblasts (see Bone-builders). 

 Overheating of engines, 33. 



of joints, 80. 

 Oxygen, absorption of, 142. 



conveyance of in blood, 32, 120. 



discovery of, 149. 

 "Oxygen starvation," 121. 



Padua, University of, 91. 

 Pain, centres for, 239. 



mechanism of transmission, 262. 

 Palate, satisfaction of, 160. 



soft, 174. 

 Pancreas, 199. 

 Pancreatic secretion, 199. 

 Paralysis of muscles, 38. 

 Pelvis (see Hip-bone). 



as respiratory base, 128. 

 Peristaltic waves, 203. 

 Peritoneum, 202. 

 Peroneal muscles, 16. 

 Petrol of sharks, 161. 



supposed origin of, 161. 



tank, 11. 

 as stomach, 160. 

 Phagocytes, 139. 

 Pharyngeal sphincter, 174. 

 Pharynx (see Throat). 



traffic in, 174. 

 Physicians, College of, 99. 

 Pineal gland, 224. 



Piston-like action of diaphragm, 129. 

 " Pit of the stomach," 132. 

 Pituitary gland, 75, 224, 227. 

 Pivot of axis vertebra, 55. 

 Police service of body, 215. 



system of colon, 211. 

 Portal circulation, 203. 



vein, 91, 200. 

 Postal system of the body, 199, 220. 

 Power gained at expense of speed, 51. 

 Priestley, Joseph, 149. 

 Protection from infection, 211. 

 Protective mechanism in great bowel, 214. 

 Proteids, 189. 



digestion of, 198. 

 Pulmonary artery, 101. 



circulation, 142. 



vessels, 93, 102. 

 Pulse of bowel, 202. 



of stomach, 183. 



waves, regulation of rate, 192. 

 Pump - action of internal - combustion 



engine, 13. 

 Pump, construction of, 109. 



system of body, 59. 

 Pumps in alimentary canal, 171. 

 " Push" versus " pull" engines, 42. 

 Pylorus, mechanism of, 180, 190. 



Quadriceps muscle, 20. 



Radiators, 134. 



Radius of forearm, 29. 



" Receiver," nature of, 255. 



Reciprocal action of muscles, 51. 



engines, 41. 

 Rectum and vent, 208. 



reflexes of, 218. 

 Red blood corpuscles, 142. 

 Reflex action, discovery of, 248. 

 explained, 253. 



actions (see also Touch-button Mechan- 

 isms). 



actions, 234. 



mechanism of heart, 114. 

 of pharynx, 174. 

 Repair of bone, 73, 272. 

 Repairs, execution of, 64, 267. 

 Residual air, 141. 

 Respiration, 120. 



antagonistic action of muscles, 128. 



defined, 123. 



discovery of nature of, 150. 



in lungs and in engine, 141. 



in motor cycle, 122. 



muscles of, 127, 129. 



old conception of, 93. 



rate of, 123. 



retarded by shoulders, 124. 

 Respiratory chambers, 137, 138. 



exchange, 142. 



effect of exercises, 153. 

 on muscles, 32. 



exercises, 144. 



movements, 125, 128. 



nerve-centres, 143. 



passages, 134. 

 cleansing of, 138. 

 Rest is necessary for muscles, 45. 



needed by nerve cells, 263. 

 Resuscitation, 242. 

 Reversed action in muscles, 68. 

 Rheumatic changes, 87. 

 Ribs, arrangement of, 125. 



as balancing levers, 23, 126. 



attachments of, 23. 

 Rickets, 74.. 



Roberts, Mr Morley, 275. 

 Rontgen's discovery, 184. 

 Rotation of head, 84. 



Saliva, formation of, 168. 

 Scapula (see Shoulder-blade). 

 Scheele, 149. 

 Sea-sickness, 193. 

 Sebaceous glands, use of, 157. 

 Secretion, 199, 223. 



mechanism of, 168. 



of gastric juice, 188. 

 Seizing of joints, 86. 



Self-repairing power of living engines, 46. 

 Sequeira, Dr James, 230. 

 Servetus, 103. 

 Sex glands, 224. 



