Articoli correlati a Lectures on the comparative pathology of inflammation
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1893 Excerpt: ...to this rule, since here we have a vegetable organism capable of locomotion and cellular digestion. The latter property, which consists in taking up and digesting or excreting the deleterious matter, contributes to the protection of the organism. Although it may not constitute inflammation itself, at any rate it represents a primitive condition of this process. Inflammation makes its appearance only in the animal kingdom and undergoes a slow evolution, which begins in the organisms that have a mesoderm. At first it cannot be distinguished from a simple intracellular digestion, effected by amoeboid and phagocytic cells of the mesoderm. Thus in the Sponges the digestive and the inflammatory functions are still united; but as soon as the endoderm becomes definitely separated from the mesoderm, the two functions diverge. The endoderm now acts exclusively as a digestive organ, while the mesoderm alone retains the power of protecting the organism against injurious agents by digesting them when possible. The mesodermic phagocytes preserve their property of intracellular digestion; this they effect either by fusing into plasmodia or by collecting to form capsules round the parasites or other foreign bodies. The phagocytic reaction is displayed by all the mesodermic phagocytes. In this process the prominent part is played in some cases by the connective tissue cells, in others by the peritoneal cells or by the corpuscles of the perivisceral fluid or of the blood. In all these cases it is the phagocytes which war against the aggressor by devouring, englobing and digesting it. It is apparent that the inflammation of vertebrates, in which the defending phagocytes emigrate from the vessels to proceed against offending bodies, is distinguished only quantitatively from th...
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- EditoreRareBooksClub.com
- Data di pubblicazione2012
- ISBN 10 1130605043
- ISBN 13 9781130605044
- RilegaturaCopertina flessibile
- Numero di pagine58
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