Week 5 1. Which statement concerning arteries, veins, and capillaries is not true?

Week 51. Which statement concerning arteries, veins, and capillaries is not true?Valves assist in the flow of blood in veins.Muscular arteries are capable of adjusting the rate of blood flow through increased vasoconstriction and vasodilation.Precapillary sphincters regulate the flow of blood in capillaries.Veins are thin walled and allow the exchange of materials between the blood and tissues.2. Factors that influence cardiac output are