A patient is hemorrhaging internally within his colon, which in turn is impairing perfusion to the cells of his body. Aside from the bleeding, the patient has no other problems. In this scenario, the problem impairing adequate perfusion would be:

Pathophysiology is a medical science that studies how diseases affect the body's systems. It combines the study of pathology (the causes and effects of disease) and physiology (how the body's systems function).

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