Which of the Following Is Not an Advantage of Closed

Multiple Choice

Which of the following is not an advantage of closed circulatory systems?

A) They have better control of blood flow to specific tissues.
B) Special cells that transport oxygen remain in vessels but can drop off oxygen where needed.
C) Extracellular fluid is the same as the fluid in the circulatory system.
D) They allow more rapid transport of substances.
E) Specialized molecules that transport hormones remain in vessels and eventually drop off their cargo.