Circulation:
o2 from atmosphere
to foot
Travels down esophagus
and trachea
Moves on into
primary bronchi
continues into
secondary bronchi
1
RBC travels to heart
through capillaries,
venules and veins
RBC enters left
atrium, through mitral
valve, left ventricle,
aortic valve and aorta
Exits through arteries
going away from the heart
to the rest of the body, in
case: a foot.
