Question

The heart in fishes always contain deoxygenated blood.Expain.​

Answer 1

Answer:

Explanation:

¶ In fish, the heart only has one atrium and one ventricle. The oxygen-depleted blood that returns from the body enters the atrium, and then the ventricle, and is then pumped out to the gills where the blood is oxygenated, and then it continues through the rest of the body.

¶ The heart of a fish is two-chambered, consisting of an auricle and a ventricle. ... The fish heart contains and pumps only deoxygenated blood, since the blood does not return to the heart after being oxygenated from the gills. Instead, it is supplied to the different parts of the body directly.

¶ The right atrium receives deoxygenated blood from systemic circulation through the superior vena cava and inferior venae cavae. The left atrium receives oxygenated blood from pulmonary circulation through the left and right pulmonary veins. Blood passively flows into the atria without passing through valves.

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