450 GLOSSARY 



the crust of the globe. It is essential to combustion or burning with 

 the elimination of heat and light when oxidation takes place. It is not 

 a food, but is essential to the act of respiration. Its absence causes 

 asphyxia or suffocation. 



Palate. The roof of the mouth. 



Palmaris Brevis (muscle). The short one of the palm. 



Palmaris Longus (muscle). The long one of the palm. 



Palpebral. Pertaining to the eyelid. 



Papilla (pi. se). (From the Latin papilla, "a nipple.") A small 

 nipple-like eminence. 



Parietal. (From the Latin word paries, "a wall.") Forming or 

 pertaining to the wall of a cavity, or portion of a membrane attached to 

 it, as parietal peritoneum, etc. 



Pars Intermedius. The part between, referring to the nervus 

 intermedius.) (See N. intermedius.) 



Parturition. (From the Latin word parturitio, from partuire, "to 

 bring forth.") The act of giving birth to the young. 



Patella (bone). (From the Latin word a dim. of patera, "a shallow 

 dish.") The knee-pan, or knee-cap; a round small bone in front of 

 the knee, developed in the tendon of the quadriceps extensor muscle. 



Pectoral. (From the Latin word pectus, "a breast.") Pertaining 

 to the chest. 



Pectoralis Major (muscle). The larger one of the chest. 



Pectoralis Minor (muscle). The smaller one of the chest. 



Pedicle. (From the Latin word pediculus, dim. of pes, pedis, "a 

 foot.") A slender process acting as a foot or stem. 



Peduncle. (From pedunculus, a dim. of pes, "a foot.") A narrow 

 part acting as a support. 



Pelvic. Pertaining to the pelvis. 



Pelvis. (From the Latin word pelvis, "a basin.") A basin-shaped 

 cavity. The bony ring formed by the two innominate bones and the 

 sacrum and coccyx. 



Peptone. The final protein body or substance formed by the action 

 of ferments on albumins during gastric and pancreatic digestion. 



Peri. A Greek prefix signifying around. 



Pericardium. (Around the heart.) The serous membrane sur- 

 rounding the heart. 



Perichondrium. The fibrous connective tissue surrounding the 

 surface of cartilage. 



Perimysium. (Around a muscle.) The connective tissue surrounding 

 the primary bundles of muscle fibers. 



Perineum. That portion of the body corresponding to the struc- 

 tures overlying the outlet of the pelvis. 



Periosteum. (Around bone.) A fibrous membrane investing the 

 surface of bones. 



Peripheral. Pertaining to or placed near the periphery. 



Periphery. (From the Greek words meaning around, to carry.) 

 The circumference; the external surface, or extreme portions of the 

 body or an organ. 



Peristalsis. A peculiar wave-like movement seen in tubes provided 

 with longitudinal, transverse, and oblique muscle fibers, as the intes- 

 tinal canal, stomach, etc. 



