Problem:
Question 1: Why do vessels branch to form capillary beds?
Question 2: Why do precapillary sphincters wrap aroung the root of each capillary where it leaves the metarteriole?
Question 3: Veins are the blood vessels that conduct blood from the capillaries towards the heart. What is the misconception?
Question 4: Do all arteries carry oxygen rich blood?
Please provide description of your answers.