BIOL273 Chapter Notes - Chapter 17: Bronchus, Pleural Cavity, Respiratory Epithelium
27 Nov 2016
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What are the 4 primary functions of the respiratory system: exchange of gases between the atmosphere and the blood. Body brings in oxygen for distribution to the tissues. Eliminates carbon dioxide waste product by metabolism: homeostatic regulation of blood by ph. Lungs can alter ph by selectively retaining or excreting carbon dioxide: protection from inhaled pathogens and irritating substances. The respiratory epithelium is well supplied with defense mechanisms to trap and destroy potentially harmful substances before they can enter the body: vocalization. Air moving across vocal cords creates vibrations used for speech, singing, and other forms of communication. Cellular respiration: refers to the the intracellular reaction of oxygen with organic molecules to produce carbon dioxide, water and energy in the form of atp. External respiration: the interchange of gases between the environment and the (cid:271)ody"s (cid:272)ells. Ventilation: the movement of air between the atmosphere and the lungs. Inspiration: the movement of air into the lungs.
