Step 1: 1. Oxygenated blood exits the left ventricle of the heart, Step 2: Oxygenated blood is pumped through the aorta, Step 3: Blood with O2 is distributed all over the body, Step 4: Capillaries - gas exchange: O2 + nutrients --> CO2 + waste, Step 5: Deoxygenated blood returns through the vena cava, Step 6: Deoxygenated blood enters the heart through the right atrium, Step 7: Blood passes from the right atrium to the right ventricle,

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恢復自動保存: ?