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Placenta   Listen
noun
Placenta  n.  (pl. L. placentae, E. placentas)  
1.
(Anat.) The vascular appendage which connects the fetus with the parent, and is cast off in parturition with the afterbirth. Note: In most mammals the placenta is principally developed from the allantois and chorion, and tufts of vascular villi on its surface penetrate the blood vessels of the parental uterus, and thus establish a nutritive and excretory connection between the blood of the fetus and that of the parent, though the blood itself does not flow from one to the other.
2.
(Bot.) The part of a pistil or fruit to which the ovules or seeds are attached.






Collaborative International Dictionary of English 0.48








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"Placenta" Quotes from Famous Books



... is nourished in the womb by measures preparing for it. The placenta or after-birth forms during the third month of pregnancy. Its function is to furnish nourishment breathing (respiration) and excreting power to the embryo or impregnated egg. The fully developed after-birth is ...
— Mother's Remedies - Over One Thousand Tried and Tested Remedies from Mothers - of the United States and Canada • T. J. Ritter

... forced him into the calling they despised—this had not troubled him greatly. For medicine was the profession on which his choice would anyhow have fallen. And to-night the book that lay before him had infected him with the old enthusiasm. He re-lived those days when a skilfully handled case of PLACENTA PREVIA, or a successful delivery in the fourth position, had meant more to him than the Charge ...
— Australia Felix • Henry Handel Richardson

... in two forms: solitary forms, and forms in which a number of salps are united into a long chain. Each salp of the aggregate form contains within it an embryo receiving nutrition from the mother by a connection similar to the placenta by which the embryo of a mammal receives nourishment from the blood of the mother. These embryos grow up into the solitary form, and the solitary form gives rise to a long chain of the aggregate form ...
— Thomas Henry Huxley; A Sketch Of His Life And Work • P. Chalmers Mitchell

... the last sterilisation cool to 42 deg. C., then add 5 c.c. sterile blood-serum from human placenta (sterilised, if necessary, by the fractional method) to each tube; ...
— The Elements of Bacteriological Technique • John William Henry Eyre

... sedate air of a man who had done his work. One of his eyes looked like an over-ripe damson, but we gave him three cheers as he made his way back to his seat. Then we went on with the dangers of Placenta Praevia. ...
— The Stark Munro Letters • J. Stark Munro

... breaks in two with a crisp crack. The girls take the broken pods and scoop out the snow-like beans with a flat wooden spoon or a piece of rib-bone, the beans being pulled off the stringy core (or placenta) which holds them together. The beans are put preferably into baskets or, failing these, on to broad banana leaves, which ...
— Cocoa and Chocolate - Their History from Plantation to Consumer • Arthur W. Knapp

... probably become less pure as the seed ripens: some, which I tried, had the purity of the surrounding atmosphere. The air at the broad end of the egg is probably an organ serving the purpose of respiration to the young chick, some of whose vessels are spread upon it like a placenta, or permeate it. Many are of opinion that even the placenta of the human fetus, and cotyledons of quadrupeds, are respiratory organs rather ...
— The Botanic Garden. Part II. - Containing The Loves of the Plants. A Poem. - With Philosophical Notes. • Erasmus Darwin

... believed to remain in a sympathetic union with the body, after the physical connexion has been severed, are the navel-string and the afterbirth, including the placenta. So intimate, indeed, is the union conceived to be, that the fortunes of the individual for good or evil throughout life are often supposed to be bound up with one or other of these portions of his person, so that if his navel-string or afterbirth is preserved and properly treated, he will be ...
— The Golden Bough - A study of magic and religion • Sir James George Frazer

... in the ghastly wound, and he was talking to the young nurse, giving her instruction, in a strange, monotonous tone. "The placenta," he was saying, "often has to be removed; we do it by twisting it round and round—very gently, of ...
— Love's Pilgrimage • Upton Sinclair

... evidence, one must seek an instance that will be crucial, one that will leave no room for other interpretations. One must, therefore, exclude consideration of cases where a mother drank before child birth. It is well-known that alcohol can pass through the placenta, and that if a prospective mother drinks, the percentage of alcohol in the circulation of the unborn child will very soon be nearly equal to that in her own circulation. It is well established that such a condition ...
— Applied Eugenics • Paul Popenoe and Roswell Hill Johnson



Words linked to "Placenta" :   caul, veil, embryonic membrane, reproductive structure, placental, placenta previa, afterbirth, uterus, ovary, vascular structure, Placuna placenta, womb



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