Biology
Brendaport
18

The heart _____. has three chambers is made of involuntary muscle receives oxygenated blood through the pulmonary vein sends oxygenated blood to the body through the vena cava is protected by the rib cage

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VickiRabeneck336

B, C, and E. The heart is made of involuntary muscle (ie cardiac muscle), receives oxygenated blood through the pulmonary veins, and is protected by the rib cage

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