G02 



HITCHCOCK'S ANATOMY 



527. Amount of Watery Vapor Discharged from the 

 Body. — The amount of fluid which is lost from the body both 

 by the skin and lungs, is about eighteen grains per minute, 

 eleven by the skin and seven by the lungs. This amount, 

 however, varies exceedingly with the state of the health and 

 the dryness or moisture of the air, which, as already men- 

 tioned, regulates the temperature of the system. 



528. The Hair. — The hair is distributed over nearly every 

 portion of the human frame, and presents differences according 



to age, sex, race, or individ- 

 ual peculiarities. In length, 

 the hair is most fully devel- 

 oped on the heads of females, 

 sometimes equaling the length 

 of the body^ while in male 

 beards it seldom reaches to 

 the waist. The coarsest hair 

 is also found on women. 



529. Size of the Hair- 

 Oil Glands, — In diameter the 

 hair varies from jjo^ to 

 o- 0 -Voth of an inch, and its 

 section is always of an oval 

 outline, but never circular. 

 Nor is the hair of a uniform 

 diameter, but it is spindle- 

 shaped almost always, and 

 terminates m a point. At its 

 base it expands into a bulb 

 which is lodged in a sac in 

 the true skin, as is seen in Fig. 295, p. 303. Just beneath the 

 epidermis one or more glands are situated which empty their 



527. What is the amount of watery fluid discharger! from the body? 528. What is said 

 of the distribution of the hair? How long has the hair been known to grow? 529. 

 What is the diameter of the hair ? What is the shape of it? What glands empty their 

 contents upon the base of each hair ? 



FIG. 294. 



Sections of Human Hair, er, 2>, Trans- 

 verse Sections showing the Cortical (or 

 external) and Medullary (or internal) Sur- 

 face, c, d, Longitudinal Sections of Hair. 

 <f, Shows the overlapping of the Epidermio 

 Scales of which hair is composed. 



