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Human respiratory system, the system in humans that takes up oxygen and expels carbon dioxide. The major organs of the respiratory system include the nose, pharynx, larynx, trachea, bronchi, lungs, and diaphragm. Learn about the anatomy and function of the respiratory system in this article.
diagram of the human respiratory system As air enters the nasal cavity through the nostrils, it is warmed and moistened by mucous membranes of the nasal turbinates before entering the pharynx. Stiff hairs lining the vestibule inside the nostrils help filter the entering air.
Human respiratory system - Mechanics, Lungs, Airways: Air moves in and out of the lungs in response to differences in pressure. When the air pressure within the alveolar spaces falls below atmospheric pressure, air enters the lungs (inspiration), provided the larynx is open; when the air pressure within the alveoli exceeds atmospheric pressure ...
Respiratory system, the system in living organisms that takes up oxygen and discharges carbon dioxide in order to satisfy energy requirements. In the living organism, energy is liberated, along with carbon dioxide, through the oxidation of molecules containing carbon.
The respiratory, circulatory, renal, and digestive systems likewise are interconnected, working together to supply oxygen and blood to tissues, remove wastes, and break down and utilize nutrients. Learn more about these amazing systems through our human body interactive.
The human respiratory system includes several parts: nasal cavity, throat, voice box, windpipe, bronchi, and lungs. Air enters this system through the nose. It then moves into the nasal cavity, a hollow space behind the nose.
The respiratory system, composed of the breathing passages, lungs, and muscles of respiration, obtains from the air the oxygen necessary for cellular metabolism; it also returns to the air the carbon dioxide that forms as a waste product of such metabolism.
An important characteristic of the human respiratory system is its ability to adjust breathing patterns to changes in both the internal milieu and the external environment. Ventilation increases and decreases in proportion to swings in carbon dioxide production and oxygen consumption caused by changes in metabolic rate.
Bronchus, any of the large airway passages of the lower respiratory tract that diverge from the trachea (windpipe) and connect to the lungs. The trachea divides in an inverted Y into the two stem (or main) bronchi, one each for the left and right lung.
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