246 PRINCIPLES OF PHYSIOLOGY 



Blastoderm (Greek, blastano, germinate; derma, skin) 

 A layer of cells formed by repeated division of the 

 primitive cells. 



Brownian movement. Rapid motion of minute micro- 

 scopical particles, first described by R. Brown, 

 botanist. 



Brunner's Glands. Small racemose (grape -like) glands 

 found in the duodenum. 



Calorimeter. An apparatus for measuring the heat of 



combustion. 

 Calorie. Thermal unit. 

 Cartilage. Gristle. 

 Casein. A proteid, forming chief constituent of cheese. 



Formed from caseinogen, by action of acids or rennin. 

 Cathode, or Katode. Negative pole of a battery. 

 Cation, or Ration (Greek, katon, that which goes down). 



An electro-positive body that passes to the negative 



pole during the passage of a current. 

 Centrosome. A minute body found within a cell. 

 Chemiotaxis (Greek, chemia, chemistry ; taxis, order). 



A property of attraction drawing micro-organisms 



or their products to the white corpuscles of the blood. 

 Chondrin. A proteid found in cartilage, etc. 

 Chromatin (Greek, chroma, colour). Colourable matter 



found in the nuclei of cells. 

 Chyle (Greek, chylos, juice). A milk-like fluid absorbed 



by the lacteal vessels in the villi of the small intestine. 

 Chyme (Greek, chymos, juice). Semi-digested matter 



that passes from the stomach into the duodenum. 

 Coagulation (Latin, con, agere, to drive together). The 



formation of a blood clot. 

 Colloids (Greek, kolla, glue or jelly). Non-crystallizable 



matter that does not pass through an animal mem- 

 brane in ordinary circumstances. 

 Corpus, corpora. Bodies, such as corpora quadrigemina, 



four twin-like bodies. 

 Crystalloids. Substances that in dialysis pass through 



animal membranes. 



