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In Biology / Senior High School | 2025-07-24

What is the role of the respiratory system in cellular respiration?

Asked by patricktuan7088

Answer (1)

The respiratory system plays a vital role in cellular respiration, which is the process by which cells produce energy (in the form of ATP) using oxygen and glucose. Without the respiratory system, oxygen would not be available for this process, and carbon dioxide—a waste product—would build up, harming cells.Steps of respiratory involvement in cellular respiration:Inhalation (Breathing in): The lungs take in oxygen from the air. This begins when the diaphragm contracts and the rib cage expands, drawing air into the lungs.Gas exchange: In the alveoli (tiny air sacs in the lungs), oxygen diffuses across the thin membrane into surrounding capillaries, where it binds to hemoglobin in red blood cells.Oxygen transport: The blood carries oxygen to all the body’s tissues.Cellular respiration: Inside the cells, oxygen is used in the mitochondria to help break down glucose in the presence of oxygen (aerobic respiration), producing ATP, carbon dioxide (CO₂), and water.Exhalation (Breathing out): CO₂ produced in the cells is transported back to the lungs, where it is exhaled.Equation for cellular respiration: Glucose + Oxygen → Carbon dioxide + Water + ATPThis entire system is critical because without oxygen, cells would shift to anaerobic respiration, producing far less energy and generating lactic acid that causes fatigue. The respiratory system makes sure that there is a continuous supply of oxygen and removal of CO₂—both of which are essential for efficient, healthy cellular function.

Answered by dapperdazzle | 2025-07-25

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