LIFESCI 2 Chapter Notes - Chapter 46: Intrapleural Pressure, Bronchus, Bronchiole
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Functions of the respiratory system: provides oxygen, eliminates carbon dioxide, regulates ph level, speech production, defense against foreign bodies. Oxygen gets to the blood from the lungs via diffusion. Term used to describe the delivering of oxygen. Air composition: only 20. 9% of oxygen, 78% of nitrogen, pressure of oxygen is proportional to the percentage of oxygen in air. Respiratory system: nasal cavity, oral cavity, pharynx, larynx, trachea, primary bronchus, secondary bronchus, tertiary bronchus, bronchiole, alveoli. Branching of the airways: trachea, pri(cid:373)ary (cid:271)ro(cid:374)(cid:272)hi se(cid:272)o(cid:374)dary (cid:271)ro(cid:374)(cid:272)hi tertiary (cid:271)ro(cid:374)(cid:272)hi . Anatomy of an alveolus: alveolar type i cells. Form the wall of the alveoli: alveolar type ii cells. Lungs: found within the rib cage. Pleural sac attaches lungs to the rib cage. Membrane like structure that allows for the ribs and. Pressure change lungs to work together: atmospheric pressure (patm, alveolar pressue (palv, intrapleural pressure (pip, boyle"s la(cid:449)