270 



INDEX 



Protoplasm, 13 



Psychic secretion, 81, 82 



Ptomains, 31 



Ptyalin, 67 



Pulmonary circulation, 118 



Pyloric sphincter, effect of acid 



upon, 74-76 

 regulation of, 74-76 

 Pylorus, 57 



RATIONS, changes in, 192 

 effect of sex, 194, 195 

 reduction of, 207-209 

 Receptors, 246, 260, 261 

 Rectal feeding, 103, 104 

 Rectum, 101 

 Red corpuscles, 107 



description of, 107-109 



function of, 109 



hemoglobin, 108 



origin, 109, 110 

 Reflex action, 46-53 

 Rennin in gastric secretion, 85 

 Reproductive organs, internal 



secretion of, 241 

 Respiration, 13, 14, 160-165 

 Respiratory center, 248 

 quotient, definition of, 172 



variations in, 173 

 Rhythmic segmentation, 89 



SALIVA, 63-65, 67 



mucin in, 65 



ptyalin in, 67 



Salivary digestion in stomach, 

 67-69 



glands, 56, 57 

 Secretin, 91 

 Secretions, 42-44 

 Secretory nerves, 42 



Sensations, general, 260 



special, 260 

 Shivering, 201 

 Skeletal muscles, 36 

 Skin as organ of excretion, 168 

 Small intestine, absorption in, 



130-133 

 digestion in, 97 

 peristalsis in, 88 

 rhythmic segmentation in, 



89 



structure, 57, 58, 62 

 villi, 130 

 Sour milk, 214 

 Specific dynamic effect of protein, 



193, 194 



Spleen, function of, 244 

 Starch, hydrolysis of, 67-69, 91 

 Steapsin in pancreatic juice, 



92 

 Stomach, absorption from, 129, 



130 



antrum of, 70, 73 

 cardia of, 57 

 fundus of, 70-72, 76 

 glands of, 79 

 movements of, 70-77 

 nervous control of, 74 

 peristalsis in, 73 

 pylorus of, 57 



salivary digestion in, 67-69 

 share of digestion, 86, 87 

 z-ray studies of, 72-76 

 Sublingual gland, 57 

 Submaxillary gland, 57 

 Sugar absorbed from stomach, 



130 



and teeth, 223 

 in diet, 222 

 in urine, 140 

 Swallowing, 65-67 

 Systemic circulation, 116 



