MAN’S NEAR RELATIVES {MAMMALS). 
223 
Is the liver anterior or posterior to the diaphragm ? 
Drawing. The internal organs in position, showing 
only lungs, heart, diaphragm, 
liver, stomach, and intestine. 
The Class Mammalia. The 
mammals bring forth their young 
alive, and nourish them during 
infancy by milk secreted by the 
mother. They have warm blood, 
and in almost all cases the body 
is covered with hair. 
The vertebrae in the mammals 
are usually flattened. The skull 
moves on the first vertebra by 
means of two condyles. There 
is no quadrate bone. All have 
the fore limbs, and nearly all 
Fig. 181.—Arm and 
Hand of Man. 
Fig. 182. —Skeleton of Chim¬ 
panzee Showing Hand. 
have also the hind limbs. Normally there are five 
toes on each foot. Almost all mammals have teeth, 
