Volume 1

A text-book of human physiology : including histology and microscopical anatomy with special reference to the requirements of practical medicine / by L. Landois ; translated from the seventh German edition with additions by William Stirling.

Landois, L. (Leonard), 1837-1902. Lehrbuch der Physiologie des Menschen. English

Date:: 1891

Credit: A text-book of human physiology : including histology and microscopical anatomy with special reference to the requirements of practical medicine / by L. Landois ; translated from the seventh German edition with additions by William Stirling. Source: Wellcome Collection.

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$composed oxygen. It is oxygen condensed to | of its volume. ^8 CO AND N IN BLOOD.—II. Carbon Dioxide.—In arterial blood there JLu^Äulspef cent, at 0° C. and 760 ..m^Hg P—^^^^^^^^^^^^^ ner cent of CO, at 0° C. and 1 metre pressure (Setschenow); but m venous blood Z am unt is vlry variable, in the veno., blood of passive 35 volumes per cent. {Sczelkow), while in the blood of asphyxia there «^^y be 52 b volumerper cent The CO^ in the lymph of asphyxia is less than that m the Ä^Sir ^;a^/.). The CO, of the blood may be extracted rom it or com- ^HyfZ!^ without, however, the alkaline reaction of the blood undergoing any change {Zuntz). (A) The CO, in Plasma (or Serum). . ^ ^^ ^ a) A minimal part is simply absorbed by the fluid part of the blood. (h) The laraest portion of the 00, belong, to the plasma (or serun ) and it all ap Ift beX a'state of ihemicalWbination. Serinii tal- CO^^,-^^^^^^^^^ pendently of pressure, hence it cannot be merely absorbed. The CO, may exist UD again into the neutral carbonate and GO,. , ■Kl^r^<^ ^^^(2) Äs the bicarbonate only gives up its CO, very slow y « vacuo wMe Woo'l ciws off its GO very energetically, perhaps the soda, united with an albuminous lody ?emm Sblhn-alkali [^o^]) combines with the GO, and forms a complex XhPO ;C0 /a0 =^^^^^^^^ When the gases are removed the CO, escapes, and neutral sodic phosphate remains. th^salt which occurs in the plasma {Hoppe-Seyler and Sertoli). Slr^d^'o^Cl^^oÄ '-il^r'Z! of Wood can fi'x nearly as much 6o, as an eciual volume o (»^'^^j^ SrMnidt) ; and (2) with increasing pressure the ^I'^^Ptf^'^f^^^ The r^^^ place in a different ratio from what occurs with serum (P^!<3«, Zuntz) ihe rea cornuscles can fix more GO, than their own volume, and the union of the GO, eTs depend upon the Äb, for Setschenow found that when Hb was acted on bv CO its power of fixing the latter was increased, which is perhaps due to the foO^n rf'some substanfe more suited for fixing CO Bohr found hat^ gram of hrjobuLSÄ^^^^^^^^ ^'i« iT^c^Tth:: of the serum-constituents, also fix CO, to the extent of i to „ of the absorbing power of serum. . ^„ . j • ,$