A patient is experiencing painful urination and frequent urges to void. Which condition should the nurse suspect?

A. Transport blood from the lungs to the heart: This is the role of the pulmonary veins, which carry oxygenated blood from the lungs to the left atrium, not the coronary arteries.

B. Supply oxygenated blood to the myocardium: Coronary arteries branch from the aorta and deliver oxygen-rich blood directly to the heart muscle, ensuring the myocardium receives the nutrients and oxygen required for continuous contraction.

C. Pump blood into the systemic circulation: Pumping blood into the systemic circulation is the function of the left ventricle, not the coronary arteries.

D. Remove carbon dioxide from the cardiac tissue: While venous drainage removes metabolic waste, this is primarily the role of coronary veins, not the coronary arteries.

A. Type O-negative: Type O-negative blood lacks A, B, and Rh antigens on the red blood cells, making it compatible with all other blood types for transfusions. It is therefore considered the universal donor for red blood cells.

B. Type B-negative: Type B-negative blood contains B antigens and lacks A antigens, so it cannot be safely transfused to individuals with A or AB blood types.

C. Type AB-positive: Type AB-positive blood has both A and B antigens and the Rh factor, meaning it can receive blood from all types (universal recipient) but is not a universal donor.

D. Type A-positive: Type A-positive blood contains A antigens and the Rh factor. It can only be transfused to individuals with compatible A or AB blood types, not universally.