386 GLOSSARY 



Pe-dun'cle: a band of nervous matter connecting different parts of 

 the brain. 



Pel'vic girdle (Lat. pelvis, a basin) : the two bones, one upon each 

 side, called the os innominatura, to which are attached the bones of 

 the upper legs. 



Pel' vis (Lat., a basin) : the pelvic girdle and sacrum. 



Pep'sin (Gr. pepsis, cooking, digestion) : a ferment found in the gas- 

 tric juice. 



Per-i-car'di-um (Gr. pericardion, around the heart) : the serous mem- 

 brane which surrounds the heart. 



Per-i-mys'i-um (Gr. peri, around, and mus, muscle) : the sheath of 

 areolar tissue which surrounds a bundle of muscle fibers. 



Per-i-neu'ri-um (Gr. peri, around, and neuron, nerve) : the membra- 

 nous sheath surrounding a nerve. 



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

 surrounding a bone. 



Pe-riph'er-al (Lat. peripheria, from Gr. peri, around, and pherein, to 

 bear, carry) : belonging to the outside or superficial portions of a 

 body. 



Per-i-staTtic (Gr. peri, around, and stellein, to set, place) : pertaining 

 to the waves of contraction, called peristalsis, running down the 

 alimentary canal to force on the contents. 



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

 membrane lining the abdominal cavity. 



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

 excretion from the skin, mainly from sweat glands. 



Pha-lan'ges (Lat., plural of phalanx, a body of troops in ranks and 

 files, from Gr. phalagx) : the bones of the fingers and toes. 



Phar'ynx (Gr. pharugx, the throat) : that part of the alimentary canal 

 between the cavity of the mouth and the esophagus. 



Phos'phate : a chemical compound of phosphoric acid with a base. 



Phos'pho-rus (Gr. phos, light, and pherein, to bring) : a chemical ele- 

 ment ; a white or yellowish waxy solid that gives off a faint glow. 



Phre'nic (Gr. phren, the diaphragm) : belonging to the diaphragm ; as 

 the phrenic artery or nerve. 



Phys-i-ol'o-gy (Gr. phusis, nature, and logia, discourse) : the science 

 which treats of the phenomena of living organisms. It is divided 

 into animal and vegetable physiology. 



Pi'a ma'ter (Lat., kind, tender mother) : the delicate vascular mem- 

 brane immediately covering the brain and spinal cord. 



