| 1. | a vascular arrangement in which blood from the capillaries of one organ is transported to the capillaries of another organ by a connecting vein or veins. |
| 2. | (loosely) the hepatoportal system. |
| portal system n. A system of blood vessels that begins and ends in capillaries. |
portal system n.
A system of vessels in which blood, after passing through one capillary bed, is conveyed through a second capillary network.