Word Finder - placenta

definition

A vascular organ in mammals, except monotremes and marsupials, present only in the female during gestation. It supplies food and oxygen from the mother to the foetus, and passes back waste. It is implanted in the wall of the uterus and links to the foetus through the umbilical cord. It is expelled after birth.

definition

It is an endocrine gland which secret human chorionic gonadotropin hormone.The HCG if detected in woman's urine then the pregnancy is confirmed.

definition

In flowering plants, the part of the ovary where ovules develop; in non-flowering plants where the spores develop.

The ovary contains one or more ovules borne on a placenta, which is generally some part of the ovary-wall.

The placenta is discoidal and deciduate.

The ovule appears at first as a small cellular projection from the placenta.

More remarkable still is the development of a small allantoic placenta.

There are five, or sometimes fewer, carpels, which unite to form an ovary with as many chambers, in each of which are one or two, rarely more, pendulous anatropous ovules, attached to the central column in such a way that the micropyle points outwards and the raphe is turned towards the placenta.

The developing embryo at the end of the suspensor grows out to a varying extent into the forming endosperm, from which by surface absorption it derives good material for growth; at the same time the suspensor plays a direct part as a carrier of nutrition, and may even develop, where perhaps no endosperm is formed, special absorptive "suspensor roots" which invest the developing embryo, or pass out into the body and coats of the ovule, or even into the placenta.

The surface of the chorion is covered evenly with minute villi, constituting a diffuse non-deciduate placenta.

It consists essentially of two parts, a basal portion forming a chamber, the ovary, containing the ovules attached to a part called the placenta, and an upper receptive portion, the stigma, which is either seated on the ovary (sessile), as in the tulip and poppy, or is elevated on a stalk called the style, interposed between the ovary and stigma.

The ovules are attached to the placenta, which consists of a mass of cellular tissue, through which the nourishing vessels pass to the ovule.

In marginal placentation the part of the carpel bearing the placenta is the inner or ventral suture, corresponding to the margin of the folded carpellary leaf, while the outer or dorsal suture corresponds to the midrib of the carpellary leaf.

When the pistil is formed by one carpel the inner margins unite and form usually a common marginal placenta, which may extend FIG.

The ovules (o) are attached to a central placenta, formed by the union of the five ventral sutures.

In these instances the placentas may be formed at the margin of the united contiguous leaves, so as to appear single, or the margins may not be united, each developing a placenta.

I, Vertical; 2, horizontal section; c, calyx; d, wall of ovary; o, ovules; p, placenta; s, stigma.

The ovules (o) are attached to a free central placenta, which has no connexion with the walls of the ovary.

In Caryophyllaceae, however, while the placenta is free in the centre, there are often traces found at the base of the ovary of the remains of septa, as if rupture had taken place, and, in rare instances, ovules are found on the margins of the carpels.

But in Primulaceae no vestiges of septa or marginal ovules can be perceived at any period of growth; the placenta is always free, and rises in the centre of the ovary.

The stigma is the termination of the conducting tissue of the style, and is usually in direct communication with the placenta.

The ovule is attached to the placenta, and destined to become the seed.

Using ultrasound to guide the way, a needle is inserted through the mother's abdomen into the developing placenta.

I had a really traumatic birth, he was born 2 mths early by emergency c-section due to me having a placenta abruption.

She has been admitted to Flagler Hospital in St. Augustine, FL with possible placenta abruption.

About ten minutes later I was having strong afterpains and feeling very uncomfortable and I wanted to try getting the placenta out.

A Cesarean birth was planned when placenta previa was discovered at 32 weeks.

Caesareane of placenta accreta is much higher in women with a prior cesarean, than otherwise.

Once routinely discarded along with the placenta and considered a waste product, it has been used in more than 6,000 transplants worldwide.

The placenta generally comes away easily, and a little massage of the uterine fundus stops further bleeding.

There was no suggestion on the scan that the placenta had separated. IV.

However, the disease can cross the placenta causing the more severe neonatal listeriosis in the fetus.

Barbiturates readily cross the placental barrier and are distributed throughout fetal tissues with highest concentrations in placenta, fetal liver and brain.

In contrast to the alkaline phosphatase, the GGT tends not to be elevated in diseases of bone, placenta, or intestine.

Neonatal immunity In Humans, maternal IgG can cross the placenta.

Karen had a natural third stage with her second baby, Lewie, after having had a retained placenta with her first baby.

I opted to deliver the placenta normally, which came out about an hour later.

Q. Can I labor with a low lying placenta?

A needle is used to take a sample of the cells that will form the placenta.

Stages of labor Q. What causes a retained placenta?

In the case of the human placenta, the evidence seems to be more equivocal.

Foals born at less than 300 days with a normal placenta are highly unlikely to survive.

An abrupted placenta meant I had my baby by emergency cesarean early -- at 35 weeks.

This may happen if you have a small or unusual shaped uterus, a fibroid or low-lying placenta.

Diagnostic tests Chorionic villus sampling This means taking a sample of a piece of tissue from the placenta.

The bandicoots alone possess a placenta.

This is often coloured, is of a denser texture than the surrounding tissue, and is traversed by fibrovascular bundles, which pass from the placenta to nourish the ovule.

In pregnancy, harmful substances in the mother 's body may cross the placenta to affect the unborn baby.

When your uterus contracts, it cuts off the oxygen supply to your placenta.

Your doctor may instruct you to push one more time as he pulls the placenta out of your body.

After your baby is delivered, he will also pull out the placenta.

Potential for the Twin-Twin Transfusion Syndrome where the shared placenta contains abnormal blood vessels affecting the babies' ability to get necessary resources from the mother.

Identical twins don't always share the same placenta, although if the egg splits after the first week they probably do.