In What Way Is a Closed Circulatory System More Efficient

Multiple Choice

In what way is a closed circulatory system more efficient than an open circulatory system?

A) A closed circulatory system is a closed loop and therefore does not require a heart for pumping blood.
B) An open circulatory system relies on diffusion to deliver nutrients to tissues.
C) A closed circulatory system relies on hemoglobin rather than on myoglobin.
D) In a closed circulatory system, blood vessels can control the delivery of O₂ to specific tissues by controlling vessel diameter.
E) A closed circulatory system keeps hemolymph separate from interstitial fluid.