After reading the paragraph below, answer the questions that follow.
Ron and Tiffany are studying circulatory system function. They designed an experiment to test whether the diameter of a tube affects the rate of flow through the tube. In their experiment, they ran water from a large container through five tubes with different diameters for exactly 30 seconds for each tube. They measured the volume of liquid that passed through the tube during the 30-second period, testing each tube three times and pouring the water back into the container after each test. The results of the experiment are shown in the following table.
| Diameter of Tube (cm) | Average Volume Fluid (mL) |
Tube A | 0.5 | 210 |
Tube B | 0.6 | 350 |
Tube C | 0.7 | 480 |
Tube D | 0.8 | 600 |
Tube E | 0.9 | 975 |
The results suggest that the smallest flow volume would be found in the ________ of the human body.
◦ capillaries
◦ arterioles
◦ veins
◦ arteries