Which can be used to characterize blood flow in the human body?
A: There is a unidirectional blood flow.
B: Arteries always carry oxygenated blood.
C: Veins always carry deoxygenated blood.
D: Arteries carry blood away from the heart.
E: Veins carry blood toward the heart.
A)a,c,d,e
B)a,b,c,d,e
C)a,d,e
D)b,c,d,e
E)d,e

Question

Quizplus · Accepted Answer

Arteries carry blood away from the heart (D), and veins carry blood toward the heart (E). Blood flow is unidirectional (A). However, arteries do not always carry oxygenated blood (e.g., pulmonary arteries), and veins do not always carry deoxygenated blood (e.g., pulmonary veins).

Which Can Be Used to Characterize Blood Flow in the Human