Question

1. oxygenated blood flows from the heart through systemic circulation in which order?

a. arteries, veins, capillaries, arterioles, venules
b. veins, venules, capillaries, arterioles, arteries
c. arteries, arterioles, capillaries, venules, veins
d. capillaries, veins, venules, arterioles, arteries

Explanation:

Oxygen - rich blood leaves the heart via arteries. Arteries branch into smaller arterioles. Arterioles lead to capillaries where gas - exchange occurs. Capillaries drain into venules, which then merge into veins that return blood to the heart.

Answer:

C. Arteries, arterioles, capillaries, venules, veins