| Q:Blood flow is expected to be the fastest through which of the following: |
| A | aorta. | |
| B | capillaries. | |
| C | venules. | |
| D | arterioles. |
The correct answer is A, the aorta. Much like a pump, pressure is always highest closer to the pump, whch in this case is the heart. As distance from the pump decreases, so does pressure. Pressure drives flow rate. Blood progressively slows down as it moves through the arterioles and then the capillaries, and then into the venous system.