Final answer:
The eye receives oxygenated blood from arteries, specifically from the ophthalmic artery branch. Systemic arteries, fed by the aorta, distribute oxygenated blood throughout the body, including the eyes.
Step-by-step explanation:
The eye receives oxygenated blood from arteries, specifically from branches of the ophthalmic artery, which is a branch of the internal carotid artery. The blood becomes oxygenated in the lungs through the process of gas exchange. After the blood has been oxygenated in the lungs, it returns to the heart through the pulmonary veins. Then, the left ventricle pumps it out through the aorta, and from there, it travels through systemic arteries to different parts of the body, including the eyes.
Regarding blood vessels and blood flow, as blood vessels coming from the body approach the heart, carrying deoxygenated blood, they get larger. This is because smaller veins merge into larger ones, which eventually lead back to the right atrium of the heart.