IMG_NEW_0003_001 - By increasing carrying capacity (some...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
. 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
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/27/2011 for the course MBB 222 taught by Professor Briscoe during the Fall '10 term at Simon Fraser.

Ask a homework question - tutors are online