Assertion: Oxygen enters the blood in the lungs during transportation in human beings.
Reason: Oxygen is inhaled into the body through the process of respiration. When breathing, the air enters the nose or mouth and passes through the trachea or windpipe. To ensure that oxygen is properly transported throughout the body, it is important to maintain healthy lungs and a strong cardiovascular system. This can be achieved through a combination of regular exercise, a healthy diet, and avoiding substances that can damage the lungs such as tobacco smoke

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answer is A.

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Detailed Solution

Transportation of oxygen in human beings is a vital process that occurs through the respiratory and cardiovascular systems. Oxygen is inhaled into the body through the process of respiration and is carried by the blood to the cells of the body, where it is used to fuel metabolism and maintain overall health. To ensure that oxygen is properly transported throughout the body, it is important to maintain healthy lungs and a strong cardiovascular system.

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