Name one living thing that lives on land, and another that lives in
water. For each, write down a characteristic that helps it live in its
environment.

Land: Ant; they don't have lungs. Which, the oxygen enters through the holes in the body.

Water: fish; they get oxygen from the water they live in. They also have gills, which are their "lungs."

Explanation:

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.