142 Self and the Phenomenon of Life
b2726 Self and the Phenomenon of Life: A Biologist Examines Life from Molecules to Humanity “9x6”the latter being attached to the pons. The medulla regulates all the vital
functions of an animal, such as heartbeat, blood pressure, and respira-
tion. The cerebellum is mainly for balance and coordination. The mid-
brain is a transition area between the hindbrain and the forebrain. The
medulla, pons, and midbrain are collectively referred to as the “brain
Fig. 7.10. Human brain in medial (A) and lateral (B) views. “A” is the right cerebral
hemisphere viewed from the midline of the brain; “B” is the left hemisphere viewed
from outside of the brain. The orientation in both cases is such that the head (front
end) is pointing to the left. The frontal lobe occupies about 30% of the cerebrum. In
“A” the cerebrum, brain stem, and cerebellum are shown; in “B” only the cerebrum is
shown. The major parts of the cerebrum are: frontal lobe, parietal lobe, occipital lobe,
and temporal lobe.