NEET PYQ's Based on Transport of Oxygen- Class 11th

Human physiology involves the study of how the body functions and maintains homeostasis. Breathing and the exchange of gases are essential processes in the human body that are vital for survival.

Breathing, also known as respiration, is the process of inhaling oxygen from the air and exhaling carbon dioxide. This process is controlled by the respiratory system, which includes the lungs, diaphragm, and respiratory muscles. When we inhale, the diaphragm contracts and moves downward, while the ribcage expands, allowing air to enter the lungs. Oxygen from the air is then transferred to the bloodstream through tiny air sacs called alveoli in the lungs. Carbon dioxide, a waste product of metabolism, is removed from the bloodstream and exhaled during exhalation.

The exchange of gases occurs in the alveoli of the lungs, where oxygen from inhaled air diffuses into the blood and carbon dioxide from the blood diffuses into the alveoli to be exhaled. This exchange is facilitated by a process called diffusion, where gases move from areas of high concentration to areas of low concentration.

Overall, breathing and the exchange of gases are crucial processes that ensure the body receives an adequate supply of oxygen and removes waste carbon dioxide. Any disruption to these processes can lead to serious health issues and impact overall well-being.

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