The laws and mechanics of circulation, with the principle involved in animal movement . ushes thedeciduous membrane before it, and comes into immediate con-tact with the congested and swollen mucous membrane producedby the physiological changes brought about by impregnation,all the parts being in correspondence from the action of thespecial nervous forces in the organs, the decidual membraneforming, as a result of the nutritive changes set up in the mu-cous membrane for feeding the ovum during the early periodbefore intimate attachment is formed with the womb, andenabling it to develop the tuf
The laws and mechanics of circulation, with the principle involved in animal movement . ushes thedeciduous membrane before it, and comes into immediate con-tact with the congested and swollen mucous membrane producedby the physiological changes brought about by impregnation,all the parts being in correspondence from the action of thespecial nervous forces in the organs, the decidual membraneforming, as a result of the nutritive changes set up in the mu-cous membrane for feeding the ovum during the early periodbefore intimate attachment is formed with the womb, andenabling it to develop the tufts in the chorion for that pur-pose. Now, then, when the ovum (Fig. J 33) comes into the 322 PHYSIOLOGICAL ANATOMY. uterine cavity, incased in an albuminous fluid and an outsidefibrous membrane or chorion answering to the egg-shell in thebirds (which is simply calcified chorion, the lime-salts beingdeposited through the structure, while the vitelline membrane(b), zona pelluclda, inclosing the vitellus (e) or yolk, is thesame in both), the epithelium of the chorion begins to prolifi-. Fig. 131.—A Vertical Section from the tTterine Mucous Membrane, showing the num-bers and position of the tubules.—Dalton. a, Free surface ; b, attached surface.
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Keywords: ., bookcentury1800, bookde, booksubjectblood, booksubjectrespiration
