Correct Option (d) intestine
Explanation:
In the hepatic portal system, the hepatic veins takes blood from intestine to the liver. This way, it takes all the nutrients absorbed from intestine to the liver first, where screening and storing of nutrition takes place.
Concept Enhancer
The portal system is a system of veins in which vein takes blood to some organ/tissue of the body other than heart. In this, the vein has capillary network at it's both ends.
There is one more portal system in human body named hypophyseal portal system present in the hypothalamus, which brings neuro secretions of hypothalamus to pituitary gland.
The renal portal system is found in fishes and amphibians. It supplies blood from posterior region of the body to the kidneys by renal portal veins to remove waste products before sending it to heart via renal veins and post canal veins.
