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placenta
[pluh-sen-tuh]
noun
plural
placentas, placentaeAnatomy, Zoology.Ìýthe 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.
Botany.Ìý
the part of the ovary of flowering plants that bears the ovules.
(in ferns and related plants) the tissue giving rise to sporangia.
placenta
/ ±è±ôəˈ²õÉ›²Ô³ÙÉ™ /
noun
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
the corresponding organ or part in certain mammals
botany
the part of the ovary of flowering plants to which the ovules are attached
the mass of tissue in nonflowering plants that bears the sporangia or spores
placenta
The sac-shaped organ that attaches the embryo or fetus to the uterus during pregnancy in most mammals. Blood flows between mother and fetus through the placenta, supplying oxygen and nutrients to the fetus and carrying away fetal waste products. The placenta is expelled after birth.
The part of the ovary of a flowering plant to which the ovules are attached. In a green pepper, for example, the whitish tissue to which the seeds are attached is the placenta.
placenta
An organ that forms in the uterus after the implantation of a zygote. The placenta moves nourishment from the mother's blood to the embryo or fetus; it also sends the embryo or fetus's waste products into the mother's blood to be disposed of by the mother's excretory system. The embryo or fetus is attached to the placenta by the umbilical cord. After birth, the placenta separates from the uterus and is pushed out of the mother's body.
Other 51³Ô¹Ï Forms
- placental adjective
- placentary adjective
- interplacental adjective
- nonplacental adjective
- preplacental adjective
- subplacenta noun
- subplacental adjective
51³Ô¹Ï History and Origins
Origin of placenta1
51³Ô¹Ï History and Origins
Origin of placenta1
Example Sentences
“You really need the antibodies in the pregnant person to go across the placenta to protect the newborn,†Chin-Hong said.
They were on the run after their car caught fire two days earlier and the police were hunting for them because they had found a placenta on the back seat.
The court has heard that they went on the run after police found a placenta on the back seat of their car, which had caught fire on the M62.
"I didn't know that your placenta has to come out. I think maybe I freaked more with that because I thought it was another baby," she recalled.
Early research suggests the chemicals can be passed on through the placenta.
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