PLEASE HELP Step 5: The blood then goes through the side of the to the It leaves the heart through the . Then the blood travels through the releasing to the cells for and absorbs .The gas exchange occurring here between the oxygen and carbon dioxide molecules occurs in the of the organs. The blood then goes back to the side of the through the veins and will go through the again.

The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle through the tricuspid valve.

The right ventricle pumps the oxygen-poor blood to the lungs through the pulmonary valve.

The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle through the mitral valve.

The left ventricle pumps the oxygen-rich blood through the aortic valve out to the rest of the body.

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explanation:

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation: