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Frog: Circulatory System Video Lecture | Biology for Grade 11

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1. What is the main function of the circulatory system in frogs?
Ans. The main function of the circulatory system in frogs is to transport oxygen, nutrients, hormones, and other essential substances throughout the body. It also helps remove waste products and regulates body temperature.
2. How does the circulatory system in frogs differ from that of humans?
Ans. The circulatory system in frogs differs from that of humans in several ways. Frogs have a three-chambered heart, whereas humans have a four-chambered heart. Frogs also have a single loop circulation, while humans have a double loop circulation. Additionally, frogs have a specialized vessel called the cutaneous respiration vessel, which allows them to exchange gases through their skin.
3. How does the circulatory system support respiration in frogs?
Ans. The circulatory system in frogs supports respiration through a process known as cutaneous respiration. Frogs have thin and moist skin that allows them to exchange gases, such as oxygen and carbon dioxide, directly with the environment. The circulatory system transports oxygen from the skin to the body's cells and carries carbon dioxide away from the cells to be eliminated.
4. What are the major blood vessels in the circulatory system of frogs?
Ans. The major blood vessels in the circulatory system of frogs include the two main arteries: the truncus arteriosus and the pulmocutaneous artery. The truncus arteriosus carries oxygenated blood from the heart to the body, while the pulmocutaneous artery carries deoxygenated blood to the lungs and skin for gas exchange. The two major veins in frogs are the vena cava, which returns deoxygenated blood from the body to the heart, and the pulmonary vein, which carries oxygenated blood from the lungs and skin back to the heart.
5. How does the circulatory system in frogs adapt to their aquatic and terrestrial lifestyles?
Ans. The circulatory system in frogs adapts to their aquatic and terrestrial lifestyles by allowing them to obtain oxygen through different means. When in water, frogs primarily use cutaneous respiration, where they exchange gases through their skin. When on land, they rely more on pulmonary respiration, breathing through their lungs. The circulatory system facilitates the transportation of oxygen to the cells during both aquatic and terrestrial respiration, ensuring the frog's survival in different environments.
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