Ap' o plex y (pleks y). A disease marked by loss of sensation and voluntary motion. A' que ous (a'-kwe-us). Watery. A rach' noid (_arachne_, a spider; _eidos_, form). A membrane like a spider's web covering the brain. Ar' bor vi'tæ means "the tree of life." Ar' tery (_aer_, air; _tereo_, I contain). So named because after death the arteries contain air only, and hence the ancients supposed them to be air tubes leading through the body. Ar tic' u late (_articulo_, I form a joint). Ar tic' u la tion. A joint. As phyx' ia (-fix-i-a). Literally, no pulse; apparent death. As sim' i la' tion is the process of changing food into flesh, etc. At' las. So called because, as in ancient fable the god Atlas supported the globe on his shoulders, so in the body this bone bears the head. Au' di to ry Nerve. The nerve of hearing. Au' ri cle (-kl) (_auris_, ear) of the heart. So named from its shape. Bi' ceps. A muscle with two heads, or origins. Bi cus' pid. Tooth with two points; also a valve of the heart. Bron' chi (-ki). The two branches of the windpipe. Bron' chi al Tubes. Subdivisions of bronchi. Bur sa (a purse). Small sac containing fluid near a joint. Ca nine' (_canis_, a dog) teeth are like dog's teeth. Cap' il la ries (_capillus_, a hair). A system of tiny blood vessels. Car' bon. Pure charcoal. Car bon' ic Acid. A deadly gas given off by the lungs and by fires. Ca rot' ids (_karos_, lethargy). Arteries of the neck, so named because the ancients supposed them to be the seat of sleep. Car' pus. The wrist. Car' ti lage. Gristle. Cell. A minute sac, usually with soft walls and fluid contents. Cel' lu lar (_cellula_, a little cell). Full of cells. Cer' e bel' lum. The little brain. Cer' e brum. A Latin word meaning brain. Cer' vi cal. Relating to the neck. Chlo' ral (klo) Hy' drate. A drug used to induce sleep. Cho' roid. The second coat of the eye. Chyle (kile). A milky juice formed in digestion. Chyme (kime). From _chumos_, juice. Cir' cu la' tion. The course of the blood through the body. Cil' i a (the plural of _cilium_, an eyelash). Hair-like projections in the air passages. Clav' i cle (klav'-i-kl). From _clavis_, a key. Co ag' u la'tion. A clotting of blood. Coc' cyx (a cuckoo). A bony mass below the sacrum. Coch' le a. A Latin word meaning snail shell. See Ear Com' pound. A substance composed of two or more elements. Con ta' gious diseases are those caught by contact, the breath, etc. Con' trac til' i ty (_con_, together; _traho_, I draw). Con' vo lu' tion (_con_, together; _volvo_, I roll). Cor' ne a (_cornu_, a horn). A transparent, horn-like window in the eye. Cor' pus cle (kor'-pus-l). From a Latin word meaning a little body. It is applied to the disks of the blood. Cra' ni al. Relating to the skull. Crys'tal line (_crystallum_, a crystal). Cu ta' ne ous (_cutis_, skin). Pertaining to the skin. Cu' ti cle (ku'-ti-kl). From a Latin word meaning little skin. Cu' tis, the true skin.