Question
Biology Question on body fluids and circulation
Incomplete double circulation is seen in
A
Fish
B
Amphibians
C
Birds
D
Mammals
Answer
Amphibians
Explanation
Solution
In amphibians, the left atrium receives oxygenated blood from the gills/lungs/skin and the right atrium gets the deoxygenated blood from other body parts. However, they get mixed up in the single ventricle which pumps out mixed blood (incomplete double circulation).