There are choices for this question namely:
convergents
connexons
portals
collaterals
arteriole beds
The correct answer is "collaterals". Collaterals are side branches of blood vessels (in this question, side branches of arteries) wherein it supplies the same capillary bed. Collaterals are mostly found pathologically in areas of ischemia and it functions to bypass the narrowed or part of the main artery.
