Humans and other vertebrates have
(1) circulatory system as opposed to
(2) circulatory system
found for example in a grasshopper. The three main blood vessels in this circulatory system are
(3).
(4)
(5). Contraction of the right ventricle pumps blood to the
(6)through a pulmonary
(7). There,
the blood loads O2 and unloads
(8). Oxygen-rich blood returns to the left
(9) of the heart. Next,
oxygen-rich blood flows into the
(10)ventricle of the heart, which pumps oxygenated blood to
(11). The blood leaves the heart through the largest artery called the
(12). The first branches called
(13) arteries supply blood to the heart itself. Arteries branch into [arterioles] in the head and arms, organs
and legs. There is a net diffusion of O2 from the blood and CO2 produced by the process of cellular
in mitochondria into the blood. Oxygen poor blood is channeled from the head, neck, and forelimbs into the
(14)
(15) vena cava and from the trunk and hindlimbs through the
(16) Both vessels empty the
oxygen-poor blood into the
(17) atrium, which then flows into the appropriate
(18).
For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).
