ISO GLOSSARY 



Ner'vous-ness. a lack of control of the mind over the messages of the 



nerves. When slight impressions of the nerves cause discomfort, a 



person is nervous. 

 Nic'o-tine, a very poisonous liquid found in tobacco. It gives tobacco 



its taste and smell, and produces its poisonous effects. 

 Ni'tro-gen, a gas which forms f of the air. It has no effect on the 



body, but its only use is to dilute the oxygen. 



O. 



0-le-o-mar'ga-rine, an imitation of butter, made of beef fat. 



pi-um, the juice of the poppy plant. It benumbs pain and produces 



sleep, and is thus a narcotic. Some men learn to use it as others do 



tobacco. It is a poison. 

 Ox-i-da'tion, the union of oxygen with a substance; burning. In 



breathing, oxygen from the air unites with the cells of the body, 



slowly burning them, and producing heat. 

 Ox'y-gen, a gas which forms one fifth of the air. Its uniting with other 



substances is burning. 



P. 



Pan'cre-as, the gland which forms the pancreatic juice ; the sweet-bread. 

 Pan-cre-at'ic juice, the fluid which the pancreas pours into the intestine. 



It does most of the work of digestion. 

 Pa-ral'y-sis, a state of the body in which it is impossible to move or to 



use some of its parts. 

 Pel'vis, the heavy ring of bone formed mainly by the hip bones. Its 



inside contains a part of the intestine. 

 Per-i-os'te-um, the tough, skinlike membrane covering the bones, and 



carrying their blood tubes. It produces new bone cells and so 



causes a bone to grow. 



Per-spi-ra'tion, the fluid produced by the skin ; the sweat. 

 Pharynx (far* inks), the muscular bag back of the nose and mouth. 



Through it both food and air pass. 

 Plas'ma, the liquid part of the blood. 

 Poi'son, a substance which can harm the body when taken in a small 



quantity. 

 Pu'pil, the round opening in the iris or colored part of the eye. It 



appears black. 

 Pus, the white, creamy matter in a boil or other abscess. 



