Question

multiple choice question
the right atrium receives ______ blood from three major veins.
o oxygen - rich
o oxygen - poor

Explanation:

The right atrium is part of the heart's structure. The three major veins (superior vena cava, inferior vena cava, and coronary sinus) that empty into the right atrium carry blood that has already delivered oxygen to the body's tissues. So, this blood is oxygen - poor. Oxygen - rich blood is carried by arteries like the pulmonary vein (which goes to the left atrium) and the aorta (which distributes oxygen - rich blood from the left ventricle).

Answer:

oxygen - poor