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 tell the correct answer ​

Answer 1

Answer:

d

Explanation:

because the fish has the single circulation of blood then the blood first moves from the gills and then the blood moves through the heart. so the (d) is the option

Answer 2

Answer:

oxygenated

in fish, the heart has only 1 atrium, and 1 ventricle. the oxygenated depleted blood return from the body enter in the atrium and then the ventricle, is then pumped out to the gills where the blood is oxygenated and then it continues through the rest of the body.