Photosynthesis requires water. The job of the roots is to find water which is called hydrotropism. The water is transported to the leaves where it is used for photosynthesis. What is the structure that carries water up to the leaves?

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it would lead to upper respiratory infections and pneumonia.

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.