placenta

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pla·cen·ta

 (plə-sĕn′tə)
n. pl. pla·cen·tas or pla·cen·tae (-tē)
1.
a. A membranous vascular organ that develops in female eutherian mammals during pregnancy, lining the uterine wall and partially enveloping the fetus, to which it is attached by the umbilical cord. Following birth, the placenta is expelled.
b. A similar organ in marsupial mammals, consisting of a yolk sac attached to the uterine wall.
c. An organ with similar functions in some nonmammalian animals, such as certain sharks and reptiles.
2. Botany The part within the ovary of a flowering plant to which the ovules are attached.

[New Latin, from Latin, flat cake, alteration of Greek plakoenta, from accusative of plakoeis, flat, from plax, plak-, flat land, surface; see plāk- in Indo-European roots.]

pla·cen′tal adj.

placenta

(pləˈsɛntə)
n, pl -tas or -tae (-tiː)
1. (Anatomy) the vascular organ formed in the uterus during pregnancy, consisting of both maternal and embryonic tissues and providing oxygen and nutrients for the fetus and transfer of waste products from the fetal to the maternal blood circulation. See also afterbirth
2. (Zoology) the corresponding organ or part in certain mammals
3. (Botany) botany
a. the part of the ovary of flowering plants to which the ovules are attached
b. the mass of tissue in nonflowering plants that bears the sporangia or spores
[C17: via Latin from Greek plakoeis flat cake, from plax flat]

pla•cen•ta

(pləˈsɛn tə)

n., pl. -tas, -tae (-tē).
1. the organ in most mammals, formed in the lining of the uterus by the union of the uterine mucous membrane with the membranes of the fetus, that provides for the nourishment of the fetus and the elimination of its waste products.
2.
a. the part of the ovary of flowering plants that bears the ovules.
b. (in ferns and related plants) the tissue giving rise to sporangia.
[1670–80; < New Latin: something having a flat, circular form, Latin: a cake < Greek plakóenta, acc. of plakóeis flat cake, derivative of pláx (genitive plakós) flat]
pla•cen′tal, adj.

pla·cen·ta

(plə-sĕn′tə)
1. The sac-shaped organ that attaches the embryo or fetus to the uterus during pregnancy in most mammals. It supplies the fetus with oxygen and nutrients and is expelled after birth.
2. Botany The part of the ovary of a flowering plant to which the ovules are attached.

placental adjective

placenta

An organ formed in the uterus during pregnancy to nourish the fetus and remove its waste products.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.placenta - that part of the ovary of a flowering plant where the ovules formplacenta - that part of the ovary of a flowering plant where the ovules form
reproductive structure - the parts of a plant involved in its reproduction
ovary - the organ that bears the ovules of a flower
2.placenta - the vascular structure in the uterus of most mammals providing oxygen and nutrients for and transferring wastes from the developing fetus
embryonic membrane, caul, veil - the inner membrane of embryos in higher vertebrates (especially when covering the head at birth)
vascular structure - a structure composed of or provided with blood vessels
uterus, womb - a hollow muscular organ in the pelvic cavity of females; contains the developing fetus
afterbirth - the placenta and fetal membranes that are expelled from the uterus after the baby is born
Translations
placenta
istukka
fylgjalegkaka
łożysko
posteljica

placenta

[pləˈsentə] N (placentas or placentae (pl)) [pləˈsentiː]placenta f

placenta

[pləˈsɛntə] nplacenta mplace of worship nlieu m de culteplace setting ncouvert m

placenta

nPlazenta f

placenta

[pləˈsɛntə] nplacenta

pla·cen·ta

n. placenta, órgano vascular que se desarrolla en la pared del útero a través del cual el feto se nutre de la madre por medio del cordón umbilical;
abruptio ___L. abrupto placentae; annular ______ anular; decidiate ______ decidua; double ______ doble; ___ previa___ previa., localizada en el segmento uterino anterior.

placenta

n (pl -tas o -tae) placenta; — previa placenta previa
References in periodicals archive ?
18] These changes could lead to a reduction in blood flow to the intervillous spaces, and alteration in the structure of the placental barrier, thereby impacting negatively on the transplacental transfer of molecules.
Studies on placental barrier function have produced discordant results (9,10).
The medication easily passes the placental barrier and confers significant protection to neonates born to women who have anti-Ro and anti-La antibodies, Julie Barsalou, MD, said at the annual meeting of the American College of Rheumatology.
Measurement of anti-TSH receptor antibodies is particularly relevant in pregnant women with clinical evidence of ATD; these antibodies can cross the placental barrier causing transient neonatal Graves disease or hypothyroidism depending on the nature of the antibodies.
This suggests that the Zika virus employs unique mechanisms to infect or bypass the placental barrier and, in turn, to cause neuronal-focused damage.
The maternal and fetal circulation are separated by the placental barrier that is formed by the syncytiotrophoblast layer, which faces the maternal environment (Wick et al.
Speaking to the press today (8 March) following an emergency committee meeting, WHO Director-General Margaret Chan said that "evidence shows it can cross the placental barrier and infect the foetus" and that the virus has been detected in the blood, brain tissue, and cerebrospinal fluid of foetuses following miscarriage, stillbirth, or termination of pregnancy.
While the link has not yet been scientifically proven, the latest research suggests the virus can cross the placental barrier.
Our results also suggest that the metals circulating in the organism are able to cross the placental barrier to reach the fetus as well as pass into breast milk.
Complementary to these studies is research track placenta in which cutting-edge models of human placental research are used to address the poorly understood physiological basis of the placental barrier function in this specific situation.
On the contrary maternal-derived unconjugated bilirubin crosses the placental barrier by passive diffusion, so the fetus is at risk for bilirubin-induced neuronal degeneration leading to permanent neurologic impairment such as ataxia, deafness, spasticity, mental retardation, choreoathetosis, seizures, or death.