PHYSL212 Study Guide - Bronchiole, Trachea, Bronchus
13 Oct 2014
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Document Summary
Study of how oxygen is brought into the lungs and delivered to the tissue and how. The structures that comprise the respiratory system are: upper airways. Larynx (vocal cords: trachea (smooth muscle + cartilage, lungs. Bronchi (smooth muscle + cartilage) (cid:0) bronchioles (smooth muscle) (cid:0) alveoli: muscles of respiration, rib cage, parts of cns that regulate respiration. The conducting zone leads gas to the gas exchanging region of the lungs: anatomical dead space (~150ml) The respiratory zone is where the gas exchange happens (it contains alveoli) From 0-4: the aggregate cross sectional area falls from the trachea through the first four generation of airways. From 4-20: the aggregate cross sectional area rises, at first slowly and then very steeply. Oxygen and carbon dioxide move between air and blood by simple diffusion of diffusion: the amount of gas that moves across a sheet of tissue is.
