Transport in Humans

left side is oxygenated blood

right side is deoxygenated blood

(Diagram is mirrored)

atrioventricular valves: between atria and ventricles

semilunar valves: between ventricles and arteries

atria has thinner walls than ventricles

pulmonary valves = pulmonary semilunar valves

aortic valves = semilunar valves

veins, venules, capillaries, arterioles, arteries

Double circulation is a circulatory system where blood travels through the heart twice during one complete circuit of the body.