Which of these structures provides the muscle cells in the heart with a constant supply of oxygen?

A. the superior vena cava

B. the pulmonary artery

C. coronary arteries

D. systemic veins

Question

Which of these structures provides the muscle cells in the heart with a constant supply of oxygen?

A. the superior vena cava	

B. the pulmonary artery	

C. coronary arteries	

D. systemic veins

blues · Answer

Process of elimination works well with this. Do you know any options on the list you're sure it isn't?

anonymous · Answer

Its not D.

blues · Answer

That is absolutely correct. Veins drain blood away from tissues, not supply it like the question asks. For that reason you can rule out the superior vena cava, too - "vena" means that it is a vein not an artery.

The remaining two options give you a choice between arteries which supply the lungs with blood (pulmonary artery) and arteries which are part of the systematic circulation...

blues · Answer

So of options B or C, which do you think it is?

anonymous · Answer

C, i researched it.

blues · Answer

Cool, C it is.