Question

Amphibians posses ______________.

• A. Hepatic portal system
• B. Renal portal system
• C. Hypophyseal portal system
• D. All of the above

Answer 1

The correct option is D All of the above

Amphibians posses.

$\Rightarrow$ Hepatic portal system

Renal portal system

$\Rightarrow$ Hypophyseal portal system

$\Rightarrow$ Hepatic portal system is a serious of veins that carry blood from the capillaries of the stomach, intestine, spleen and pancreas to capillaries in the liver.

$\Rightarrow$ Renal portal system is a venous system found in all living vertebrates except for Hagfish lampreys and mammals. Its function is to supply blood to renal tubules when glomerular filteration is absent or downregulated.

$\to$ Hypophyseal portal system:- A system of blood vessels that connects the hypothalamus and anterior pituitary gland.