Blood passing through the tricuspid valve has just left the:

Correct Answer: A

Rationale: Blood passing through the tricuspid valve has just left the right atrium.

Correct Answer: C

Rationale: Atrial systole pushes blood from the atria into the ventricles through the cuspid (atrioventricular) valves (tricuspid and mitral), not out of the heart or through semilunar valves.

Correct Answer: B

Rationale: The patient who has 'wet-cold' clinical manifestations of heart failure is perfusing inadequately and needs rapid assessment and changes in management. The other patients also should be assessed as quickly as possible but do not have indications of severe decreases in tissue perfusion.

Correct Answer: D

Rationale: The apex of the heart is formed by the left ventricle, located at the bottom left of the heart, pointing inferolaterally.

Correct Answer: C

Rationale: Sinusoidal capillaries, with large gaps, are found in red bone marrow, liver, and spleen, not typically in pulmonary capillaries.