(b) Amphibians have two circulatory pathways. One is to oxygenate the blood through the lungs and skin, and the other is to carry oxygen to the rest of the body. Blood is pumped from a three-chamber heart with two atria and one ventricle.
How does the frog's circulatory system work?
However, like humans, frogs have a systemic circulation that pumps oxygenated blood throughout the body. The pulmonary circulation moves blood to the lungs and takes up oxygen. Frogs also have a pulmonary skin circuit where deoxidized blood is carried to the skin to absorb oxygen and undergo gas exchange. 2019
What kind of circulatory system can be found in amphibians?
Thus, amphibians have a dual circulation system consisting of two circuits. The systemic circulation circulates blood between the heart and the rest of the body, and the lung skin circuit circulates blood between the heart, lungs, and skin.
How does the heart of a three-chamber frog work?
The frog's heart has three atriums. Two atria and one ventricle. The atrium receives deoxygenated blood from the blood vessels (veins) that drain various organs of the body. .. Oxygenated blood from the left atrium is sent relatively purely to the carotid arteries, carrying blood to the head (and brain).
Which type of circulation exists in amphibians and reptiles?
In amphibians, reptiles, birds and mammals, blood flow is directed to two circuits. One passes through the lungs and returns to the heart, called the pulmonary circulation. The other flows to the rest of the body and its entire organs. Brain (systemic circulation).
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