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Cover Work - Coggle Diagram
Cover Work
Raspatory System
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Full Description
When we breathe in, air moves through the mouth and nose and then travels into the Trachea. The trachea carries air from the throat to the lungs.
Near the lungs, the trachea divides into tow tubes called bronchi, one entering the left and one entering the right lung. Once inside the lung the bronchi split seral ways, forming smaller and smaller bronchi.
The smaller bronchi further divide into bronchioles, which are very narrow tubes, less than 1 mileometer in diameter. There is no cartilage within the bronchioles. At the end of each bronchiole are openings to the alveoli. There are usually several alveoli coming from one bronchiole, forming a little clump that resembles a cluster of grapes
Gas Exchange
Definition: The exchange of oxygen and carbon dioxide between an organism or cell and the environment
Key Terms
Capillary: The fine branching blood vessels that form a network between the arteries and veins. One cell thick.
Alveolar wall: The thin wall of the alveoli, the smallest air sacs in the lungs, that separates each air sac from the next
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Description
Gaseous exchange at the lungs takes place by diffusion. The gases carbon dioxide and oxygen move down a concentration gradient from a high concentration to low concentration
