Question 19
Transport in AnimalsWhich of the following describes the sequence of blood flow from the heart to a tissue?
- A.Heart → artery → arteriole → tissue
- B.Heart → vein → venule → tissue
- C.Heart → venule → vein → tissue
- D.Heart → arteriole → artery → tissue.
Show the answer and explanation
Answer: A (Heart → artery → arteriole → tissue)
Explanation
Blood leaves the heart in arteries, which branch into smaller arterioles and then capillaries in the tissue. Veins and venules bring blood back to the heart.