Identify the blood vessel that carries blood from the left ventricle.

Correct Answer: A

Rationale: The aorta carries oxygenated blood from the left ventricle to the body.

Correct Answer: B

Rationale: Blood pressure is highest in the aorta, where blood is ejected from the heart, and lowest in the vena cavae, where blood returns to the heart.

Correct Answer: B

Rationale: The descending aorta (abdominal aorta) ends by branching into the common iliac arteries.

Correct Answer: A

Rationale: The valves of the heart are made up of dense connective tissue, which provides the necessary strength and flexibility to withstand the pressure changes within the heart during the cardiac cycle.

Correct Answer: D

Rationale: The P wave on an ECG signifies atrial depolarization, initiating atrial contraction and subsequent ventricular filling.