Statement of a theory of life, founded on observations & experiments / by David Porter, M.D.

  • Porter, David, M.D.
Date:
1829
Catalogue details

Licence: Public Domain Mark

Credit: Statement of a theory of life, founded on observations & experiments / by David Porter, M.D. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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    cnntri ■' :!■ nil? iq as to keep in close co >iacl withffs . . To facilitate this, its diverticulum the spleen, is enlarged ■ pissage to more blood which, with d greater quantity also forced into the nepi'ick artery, increases the functions of the liver and piquets more bile to meet the food in Ihe duoddrium. As (lie food comes in contact, through millmns of pores, with the blood of ihe cellular*ar ':-sare gradually charged from the lymph uot.il lh< softened into cbymo, and finally melted into fluid matter^ sufficieritlj positive for forming chyie and undergoing absorption. I'hjs maj also take place withorganised particles placed under the same ciTCiuo* s>ai\ces in any part of the body as :s well known of animal ligatures, ■ 4'. A porti >n of food remaining in thestoinach and becoming highlj eli-irged, iorms the gastric find. As soon as the chyme leaves the stomach, it receives the bile which hv its a!'-, iline properties,prevents aaccseencynnd by its bitter quality forms the most appropriate chemical stimulus for the bowels. In those : 1* the food of which contains bill little of the bitter principle the the hitler quality of the biieia more eubcLuaiiy secured by a gall bladder. A.3 agrt^it supply ofilaid frorocorrtrcefio;^ and absorption during;. digestion must gradually oense as tlu? process is completed, seme provision is necessary to guard against the consequences ofa reduced supply to the great semilunar ganglion.. Tiiis provision*is found in Hie p nh'rras. Having no blood-vessel particularly appropriated to ift like other glands, it receives, branches from those of the contiguous is, by which means as those organs become empty 01 contracted j*ss arteries receive a Jaeger supply of blood. This keeps up the supply «fok;id by an increased exercise ofi's vascular fibres, as well as by the fib'-or;)'ion of lymph whiob is thrown off .11 secreifop, by its cellular grtciies. 31 . Sccrcfio7i,ti'drili';n, md growth. Of'.he blood which is pour- r I into the nerves from the cellular arteries, whatever is not taken up by verrotis and lymphaliok absorption, either passes off by the pores o, ' Tories, as secretion, or is deposited for nutrition or growth. The quantity secreted is directly as the quantity of blood ^thrown in, and inversely as absorption from the part, while it • depends pull's f blood thrown in and partly: on therei live powevofvei tick absorption in the part, hi addition fc - nature ot> 3 deposited in nutrition and growth, ii ic5a< need b'j ihe. i u attractions of each part, which exist from the priraordium oi be n^ { V. Or THE FUNCTIONS OF THE MEN'B. Sensation by the Receivers, Increase in the quantity offhitf] '.' nished by any part to the brain, produces in the soul or mil ■,