Weegy: A. Arteries. The veins outer walls have the same three layers as the arteries User: Almost ________ of the total blood volume is in the veins at any given time.
D. 90% Weegy: C. 70% percent of the total blood volume is in the veins at any given time. User: The brain is divided into the _______.
C. Brain stem
D. All of the above Weegy: A. Cerebrum User: The ... (More)