Imagine a red blood cell in the artery supplying the small intestine, a cell that is on its way to deliver oxygen to the small intestine.

Imagine a red blood cell in the artery supplying the small intestine, a cell that is on its way to deliver oxygen to the small intestine. From this point in the artery, how many capillary beds must this red blood cell pass through before it returns to the left ventricle of the heart? Hint: You’ll need to do a little research on this one!