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IMG_NEW_0003_001 - By increasing carrying capacity(some...

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. nerve outputs to diaphragm, muscles of rib cage . inputs: pH [COz] of cerebrospinal fluid and pH sensors in major blood vessels Avian respiratory system - more complex and more efficient than that of mammals! (Fig. 42.261 4. The basic requiqement of respiration is to exchange 02 at a sutficient rate so the tissues can function. Convection or circulatory systems deliver Oz. There must be sufficient 02 carrying capacity in respiratory fluids (blood or hemolymph) to deliver all the oxygen taken uP. Animals have incredible adaptations of respiratory fluids to overcome this challenge to carry all the oxygen. ; ;;;'"r!r,,r* J:vg,fu,#ki*, \_-_ t"'"'S-bi?1, r )vP POz: At sea level, the atmospheric pressure is 760 mmHg. O2is2LYoof air. PO 2=(O.2t* 760)= 169 m m Hg. ln the lung, since ventilation is TIDAL, old air with Oz removed, mixes with fresh air: POt=194. At the tissue level, where 02 is being used up, the POz is even less: <40 mmHg. Thus, consider PO2 as a concentration measure. 5. Respiratory pigments carry 02 in the blood By increasing carrying capacity of blood
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