Which Can Be Used to Characterize Blood Flow in the Human

Multiple Choice

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