Which Statement Best Describes Parallel Flow in the Circulatory System

Multiple Choice

Which statement best describes parallel flow in the circulatory system?

A) Parallel flow refers to the flow of blood just to the heart itself, which keeps it oxygenated at all times.
B) In the systemic circuit blood flows from one organ directly to the next, hence in parallel.
C) Parallel flow refers to the flow of electrical impulses in the heart.
D) The organs of the body are arranged in a parallel circuit to allow adequate flow and pressure to all body systems and maintain homeostasis of blood pressure.
E) Parallel flow refers to deoxygenated blood only and not to oxygenated blood.