A Level Biology Practice Exam

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What is the main artery of the body in mammals?

Coronary artery
Aorta
Femoral artery
Subclavian artery

The correct answer is: Aorta

The main artery of the body in mammals is the aorta. This large artery originates from the left ventricle of the heart and is responsible for distributing oxygenated blood to all parts of the body through a network of smaller arteries. The aorta is crucial for maintaining efficient circulation, as it handles the highest pressure in the arterial system due to the force generated by the heart's contraction. The coronary artery, while important for supplying blood to the heart muscle itself, branches off the aorta and is not the main artery of the body. The femoral artery primarily supplies blood to the lower limb, and the subclavian artery supplies blood to the arms and some parts of the head and neck, but neither serves as the body's main conduit for blood flow like the aorta does. Thus, the aorta's role as the main artery is fundamental to the overall circulatory system in mammals.