Which statement is true?
• Arterioles are known as capacitance vessels.
At any given time about 90% of all capillaries are open.
• There are equal amounts of blood in the systemic circuit and the pulmonary circuit.
Most blood is found in the arteriole portion of the vascular tree.
• About 60% of the blood is found in the systemic venous system.
About 60% of the blood is found in the systemic venous system.
The true statement among the options provided is:
• About 60% of the blood is found in the systemic venous system.