How is the circulation of blood achieved in frogs?

How is the circulation of blood achieved in frogs?
  1. By the muscles in the blood vessels
  2. By the movement of the lymph
  3. By the pumping action of the muscular heart
  4. By the movement of the lymph channels

Solution

The circulation of blood is achieved by the pumping action of the muscular heart. The heart pumps blood through the arterial system to all parts of the body, and the veins collect the blood and bring it back.

Asked in: NCERT

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