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resp system - called sufactant 3 Respiratory physiology a...

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1 RESPIRATORY SYSTEM 1. Functions a. Provide area for gas exchange b. Movement of air c. Protection from dehydration, temp changes, pathogens d. Produce sounds e. Sensation of smell 2. Conducting passageways - warm and purify air before it gets to lungs a. Nostrils - external nares b. Sinuses - cavities in skull - lighten the skull, produce mucous c. Conchae - 3 layers - superior middle and inferior d. Pharynx (throat) - nasopharynx, oropharynx, laryngopharynx e. Larynx (voice box) - 2 sets of vocal chords, true and false vocal chords f. Trachea - rings of cartilage i. Epiglottis - flap goes over trachea when swallowing g. Brochi - end in the lungs, primary, secondary, tertiary h. Lungs - Right lungs has 3 lobes, left lung has 2 lobes i. Bronchioles - respiratory zone i. Respiratory bronchioles (1) Alveolar sacs (2) Ducts (3) Alveoli - thin cells, epithelial layer - coated with oily substance
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Unformatted text preview: called sufactant 3. Respiratory physiology a. Pulmonary ventilation - (breathing) b. Gas exchange between pulmonary blood and alveoli (in lungs), external respiration c. Gas transport - blood carries gases to and from body tissues d. Internal respiration - gas exchange between blood and tissue cells of body 4. Respiratory cycle - one breath 5. Tidal volume - amount of air that moves in and out of the lungs in each breath 6. Gas transport in blood a. Oxygen - most is attached to hemoglobin b. Carbon Dioxide - some can attach to hemoglobin , some is dissolved into plasma, most of it is converted into carbonic acid, buffers - bicarbonate, converts acid into less harmful form and eventually dumps off carbon dioxide into lungs 7. Control of respiration is done by pons and medulla oblongata...
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