Human Body: Respiratory System

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Respiration is the process by which cells break down glucose (food) using oxygen to release energy in the form of ATP. This energy is used for all life processes like movement, growth, and repair. For…

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Breathing is the physical process of taking in oxygen-rich air into the lungs (inhalation) and pushing out carbon dioxide-rich air (exhalation). It involves movement of the diaphragm and ribs. For exa…

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Breathing is a physical process involving inhalation and exhalation of air, while respiration is a biochemical process where glucose is broken down in cells to release energy. Breathing happens in lun…

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The main organs are: nose, pharynx, larynx, trachea, bronchi, and lungs. Air enters through the nose, passes through the throat and windpipe, and finally reaches the lungs where gas exchange occurs.

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The nose filters dust and germs using hairs and mucus, warms and moistens the air, and helps in smelling. The sticky mucus traps dirt, and the warm lining prepares air for the lungs.

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The nose has hair and mucus that filter dust and germs, warms cold air, and moistens dry air. Breathing through the mouth skips this protection, allowing dirty, cold, or dry air to enter the lungs, wh…

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The pharynx is a common passage for both air and food. It connects the nose and mouth to the larynx (for air) and the esophagus (for food). A flap called epiglottis prevents food from entering the win…

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If food enters the windpipe, it triggers coughing to push it out. This happens when the epiglottis doesn’t close properly during swallowing. Coughing is a protective reflex to clear the airway and pre…