GLOSSARY 



449 



Panic (Gr. to panikon, from Pan, the god of the woods, and of sudden 

 fear), a sudden and infectious fear which sometimes seizes upon a 

 crowd. 



Pa-pil'la (Lat. papilla, pimple), a minute projection of the true skin 

 into the epidermis. It contains the endings of the nerves of 

 touch . 



Pa-ral'y-sis (Gr. para, beside, and luein, to loosen), lack of action of 

 a part due usually to a failure of the motor nerves to bring the im- 

 pulses for action. 



Par-e-gor'ic (Gr. paregoros, soothing), a sweet-tasting mixture contain- 

 ing opium and used chiefly in quieting children. 



Pa-ri'e-tal bones (Lat. paries, a wall), the top and sides of the 

 skull. 



Pa-ro'tid glands (Gr. para, near, and ous, ear), the salivary glands in 

 the front of the ear. 



Pel'vis (Lat. pelvis, basin), the massive ring of bone which forms the 

 hips. Its cavity is somewhat larger than a large tea cup and con- 

 tains some of the intestine. 



Pep'sin (Gr. peptein, to cook or digest), a lifeless ferment found in the 

 stomach of all animals. It digests albumin. 



Pep'tone (Gr. peptos, cooked), the form to which albumin is changed 

 by digestion. 



Per-i-car'di-um (Gr. peri, around, and kardia, heart), the thin bag 

 which surrounds the heart. 



Per-i-os'te-um (Gr. peri, around, and osteon, bone), the thin, tough 

 membrane which covers bone, reproduces its cells, and transmits Us 

 blood vessels and nerves. 



Per-i-stal'sis (Gr. peri, around, and stellein, to arrange), the regular, 

 worm-like movements of the alimentary canal, which force its con- 

 tents onward. 



Per-i-to-ne'um (Gr. peri, around, and teinein, to stretch), the thin, 

 shining membrane which lines the interior of the abdomen and 

 covers its organs. 



Per-spi-ra'tion (Lat. per, through, and spirare, to breathe), the watery 

 secretion of the skin. The sweat. 



Pha-lan'ges (Gr. phalagx, a rank of soldiers), the rows of bone which 

 form the fingers and toes. Its singular is phalanx. 



Pharynx (far 1 inks} (Gr. pharugx, the throat, from pharein, to cleave), 

 the cavity back of the nose and mouth. 

 ov. PHYSIOL. 29 



