GLOSSAttY 385 



Organ of Cor'ti (named from Corti, an Italian scientist) : an epithelial 

 structure within the membranous cochlea believed to contain the 

 end organs for hearing. 



Os in-nom-i-na'tum (Lat., nameless bone) : the hip bone. 



Os-mo'sis (Gr. osmos, impulsion, pushing) : the diffusion ot fluids 

 through membranes. 



Os'se-ous (Lat. os, bone) : bony, made of bone; as osseous tissue. 



Os-si-fi-ca'tion : the process of changing into bone. 



O'to-liths (Gr. ous, otos, ear, and lithos t stone) : minute hard particles 

 in the passages of the inner ear. 



Ox-i-da'tion : the chemical union of oxygen with other substances, as 

 in combustion. 



Ox-y-gen (Gr. oxus, sharp, acid, and -gen, producing, because errone- 

 ously supposed to be present in all acids) : a gaseous chemical ele- 

 ment found in the atmosphere and in many compounds. 



Ox-y-hem-0-glo'bin : hemoglobin which has united with oxygen. 



Pa-cin'i-an corpuscles (named from Pacini, an Italian physician) : 



one of the forms of touch end organs. 

 Pal'ate (Lat. palatum) : the roof of the mouth and floor of the nose. 



The soft palate is a fold of muscular membrane hanging between 



the back part of the mouth and the upper part of the pharynx. 

 Pan'cre-as (Gr. pan, all, and krea*, flesh) : a gland in the abdomen 



near the stomach. It pours its secretion into the duodenum. In 



animals it is called sweetbread. 

 Pan-cre-at'ic juice : the secretion of the pancreas which acts upon the 



fats and proteids in the food. 

 Pa-pilla (Lat., a nipple) : a minute, rounded projection ; as the papillae 



of the tongue. 

 Pap'il-la-ry muscles : muscular bundles within the ventricles of the 



heart, attached to the heart walls and, by the tendinous cords, to 



the valves between the auricles and the ventricles. 

 Pa-ri'e-tal bones (Lat. paries, wall) : bones of the cranium forming a 



part of the top and sides of the skull. 

 Pa-rot'id glands (Gr. para, near, and ous, otos, ear) : the salivary 



glands near the ears. 



Pa-tel'la (Lat., a small pan or dish) : the knee pan. 

 Pec'to-ral girdle (Lat. pectoralis, pertaining to the breast) : the clavi- 

 cle and scapula upon each side, to which are attached the bones of 



the upper arms. 



