The chamber that pumps oxygen rich blood to the body is the

Correct Answer: C

Rationale: The left ventricle pumps oxygenated blood into the aorta for systemic circulation.

Correct Answer: B

Rationale: Carbon dioxide moves between blood and tissue fluid primarily via diffusion, driven by concentration gradients.

Correct Answer: C

Rationale: The brachial artery in the upper arm is used with a sphygmomanometer because it's large and accessible under the cuff.

Correct Answer: C

Rationale: The myocardium is the muscular layer responsible for heart contraction.

Correct Answer: D

Rationale: The vagus nerve carries parasympathetic signals that decrease heart rate and cardiac output, promoting relaxation and energy conservation.