The options below show the names of three blood vessels in the renal circulation of a mammal:
The table below gives structural measurements for these three blood vessels. Complete the table by identifying which blood vessel belongs to each row.
| Name of blood vessel | Diameter of the lumen (mm\text{mm}mm) | Thickness of the vessel wall (mm\text{mm}mm) |
|---|---|---|
| (1) | 7.5 | 0.5 |
| (2) | 0.007 | 0.0005 |
| (3) | 5.5 | 1.2 |
Which of these three blood vessels carries blood directly to the kidneys under high hydrostatic pressure?
Which of these three blood vessels contains valves along its length to prevent the backflow of blood?
Identify which of these blood vessels is adapted for the exchange of nutrients and metabolic waste, and explain how its wall structure facilitates this function.
