GLOSSARY. ) 87 



Vaso-dila'tor (L. vas t a vessel ; dilator, a widener). Applied 

 to those nerves or impulses which reflexly produce dilata - 

 tion of arteries. 



Verti'go (L. verto^ I turn; ago, to act). Giddiness. A dis- 

 turbance of equilibrium. 



Vital capacity. The greatest amount 'of air which can be 

 expired after the deepest inspiration. Extreme differential 

 capacity. Extreme respiratory capacity. 



Vitel'iin. A globulin occurring in yolk of egg. 



Waller's method or law. When a nerve is isolated from its 



centre or ganglion, it degenerates. 

 Weber, glands of, Mucous glands situated near roof of 



tongue. 



Wharton's jelly. Mucoid tissue of umbilical cord. 

 Wood's muscle. Often represented only by fibrous tissue. Is 



attached to external tuberosity of os calcis and base of 



fifth metatarsus. Abductor ossis metatarsi quinti. 

 Wiisberg, Cartilage of. A small elastic cartilage in aryteno- 



epiglottic fold. 



Xan'thin (Gr. xanthos^ yellow). A nitrogenous waste material 

 intermediate between uric acid and sarkin. 



Zymogen (Gr. zume, ferment; gennao, I produce). The 

 " mother substance " which precedes the ferment. 



