LIFESCI 2 Lecture Notes - Lecture 17: Medulla Oblongata, Phrenic Nerve, Carotid Body
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Functions of the respiratory system: provides oxygen, eliminates carbon dioxide, regulates ph level c. i. High co2 means high h+ so low ph not good c. iii. Low co2 means low h+ so high ph c. iii. 1. Lungs have some immune cells called macrophages to get rid of. Respiration contamination of outside air: systemic circulation, pulmonary circulation, once oxygen has gotten to lungs, 1. Ventilation: constant exchange of air with environment; passive d. i. Oxygen goes through respiratory system lungs d. ii. Once we get the oxygen inside our lungs, it doesn"t do us any good yet d. iii. Want the o2 in our cells because that"s where atp production is: 2. Simple diffusion o2 gets to cells: 3. Blood is cellular (red blood cells) and fluid (plasma) f. ii. Called bulk transport because very large quantity of o2 constantly being transported f. ii. 1. Oxygenated blood returns to heart & simple diffusion allows o2 to move to cell through capillaries: steps 1-4: external respiration h. i.
