Question

In case of aquatic organisms like fish, the blood entering the heart is
a. oxygenated
b. deoxygenated
b. mixed
d. first oxygenated then deoxygenated

please answer as soon as possible​

Answer 1

Answer:

The amphibians have blood directed in two circuits with two atria and one ventricle where mixing of blood takes place.

So the correct answer is 'amphibian'.

Answer 2

Answer:

b. deoxygenated

is the answer of this question