GLOSSARY 377 



En-do-car'di-um (Gr. e.ndon, within, and kardia, the heart) : the mem- 

 brane lining 1 the cavities of the heart. 



En-do-skel'e-ton (Gr. endon, within, and Eng. skeleton) : the inner 

 bony framework possessed by vertebrate animals. 



En-do-the'li-um (Gr. endon, within, and thele, nipple) : the thin epi- 

 thelium lining blood vessels, lymphatics, and serous cavities. 



Ep-i-der'mis (Gr., epi, upon, and derma, skin) : the outer layer of the 

 skin, which is without blood vessels and nerves, and without sensa- 

 tion. 



Ep-i-glot'tis (Gr., from epi, upon, and glotta, tongue) : a lidlike sheet 

 of cartilage which closes the glottis while food or drink passes 

 into the pharynx. 



Ep-i-the'li-um (Gr. epi, upon, and thele, nipple): the superficial layer 

 of cells of the skin and mucous membrane, and of the blood vessels, 

 lymphatics, etc. 



E-soph'a-gus (Gr. oisophagos, the gullet) : that part of the alimentary 

 canal between the pharynx and the stomach. 



E'ther (Gr. aiiher,fromaithein,to burn, blaze) : a thin, elastic medium 

 supposed to pervade all space. 



Eth'moid (Gr. ethmoeides, like a sieve) : the bone through which the 

 olfactory nerves pass out of the cranium. 



Eu-sta'chi-an tube (named from Eustachi, an Italian physician) : the 

 small tube connecting the tympanum and the pharynx. 



Ex-cre'tion (Lat. excernere, excretum, to sift out) : the act of discharg- 

 ing from the body useless or worn-out material. 



Ex-0-skere-ton (Gr. exo, without, and Eng. skeleton) : the outer hard 

 crust or covering of many of the invertebrate animals. 



Ex-pi-ra'tion (Lat. ex, out, and spirare, to breathe) : the act of breath- 

 ing out; opposed to inspiration. 



Fau'ces (Lat., throat) : the narrow passage from the mouth to the 

 pharynx. 



Fe'mur (Lat., thigh) : the thigh bone. 



Fe-nes'tra (Lat.) : a window. The /enex/ra ovalis and fenestra rotunda 

 are the oval and round openings in the bone between the cavity of 

 the tympanum and the labyrinth of the ear. 



Fer'ment (Lat. fermentum, tumult, agitation) : that which causes fer- 

 mentation, as yeast. 



Fer-men-ta'tion : the transformation of an organic substance into ie\ 

 chemical compounds by the action o a ferment. 



