Placenta

nutrition for fetus no blood mix thru mother and fueetus

trophoblasts/chorionic villi and the uterus form the placenta

The placenta can be located anywhere in the uterus.

This is called Placenta previa and it means that they will have to give you a c-section, because the placenta would be delivered before the baby and that is not a good thing so they play it safe by doing the c-scection. It also depends on how far you are. If you are not that far along then it is a chance that the placenta will move up.

I am assuming you do not know how a placenta looks like. It's not just a thin cord. It's pretty large, not something you can easily forget to "remove". I can't imagine a doctor forgetting to remove that. And if the doctor does forget, the patient will lose a lot of blood, and then would probably die.

glucose

Some substances are filtered but the reason some might get through is that the placenta is connected to your baby through you so in affect any harmful substances you have eg alcohol the baby will also have

no they do not. Mammals are divided into three groups; monotremes, marsupials, and placental mammals.

Yes, they do because they belong to infraclass Placentalia.

estrogens, progesterones, and human chorionic gonadotropin (HCG)

The umbilical cord, which connects the placenta to the baby, needs to be cut so that the baby's blood supply can be secured within the baby's body, and the now dead placenta can be disposed of.

first

They lay eggs during pregnancy.

fundal

it's the emberyo because its the blood from the baby is used for the mother so it is very good for a mother to use !

The structure of the placenta is related to its functions because its functions is to support the embryo/foetus in ways such as providing it with nourishment, and oxygen which explains the relevance of the placenta to its function of supporting the growing individual.

The mother's immune system.

the blood from the mother runs alongside the blood from the foetus ;the mother's blood carries food and oxygen to the baby .The oxygen reachs the lungs and carbon dioxide +waste exits through the umbilical cord . Although they run beside each other they never mix.

The endometrium begins to form shortly after the fertilized egg (blastocyst) implants into the uterine wall (endometrium). This typically occurs 3-4 days after fertilization. After implantation, the endometrium is called the Decidua, and basalis is the portion directly under the blastocyst. The Basalis joins the chorionic villi to make the placenta.

APEX~ a few days after fertilization

Fraternal (non-identical) do not share the same placenta as they are two babies formed from two eggs and two sperm. If they implant close together they may appear to be one placenta, but they are not. Identical twins formed from one egg and one sperm may split at any stage from the two cell right up to late in embryonic development which produces conjoined (Siamese) twins. The later in embryonic development the split occurs the more likely they are to share a placent.

that would be the oxygen because whene a foetus breaths out it cant breath anywhere so it gouse to the mother and she exhales it out

my current week pregnancy 25weeks but placenta posterior upper grade 0 till is this any problem for normal delivery

This condition is called Placenta Previa. With placenta previa, the placenta grows on the lower part of the uterus partially or totally covering the opening of the cervix. The placenta should form at the top of the uterus, above the baby. With a normal pregnancy, the baby would be born first, then the placenta. With placenta previa, the placenta would be delivered first. Women with placenta previa require a c-section because as soon as the umbilical cord comes into contact with oxygen, the baby will automatically breathe with his lungs. Delivering the placenta first puts the baby at risk of suffocation in the womb.

They develop by feeding from the yolk of the egg that the frog has laid and that is the equivalent of a placenta.