Articles liés à Human Physiology, Vol. 3 (Classic Reprint)

Human Physiology, Vol. 3 (Classic Reprint) - Couverture souple

Luciani, Luigi

 
9781440084638: Human Physiology, Vol. 3 (Classic Reprint)

Synopsis

IN the last chapter (Vol. I. xiv.) we discussed the formation of
lymph through the walls of the blood capillaries, and the physiology
of the lymphoid tissues and organs (which continually pour out
new cells, as well as the chemical products of their anabolisrn and
katabolism, into the lymph and blood stream), and referred in
general terms to the physiological concept of the so-called secretory
processes. If secretion means every alteration by the tissue-cells
of the medium in which they live either by the removal from
it of all the materials required for their nutrition, or by the
return to it of all the products of their metabolism we should
obviously have to admit that every living cell, as such, exhibits
secretory activity (Brown-Sequard). But the concept of secretion
must be taken in a more restricted sense. The term secretory
is not applied to the cells which form the nervous and mus-
cular tissues, nor, speaking generally, to the active and passive
mechanisms of sensation and movement, while it is used of the
histological elements that participate actively in the production
and purification of the blood and lymph, particularly the epithelia

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