Placenta

During pregnancy carbon dioxide passes from the mothers blood to the baby's blood because the mother breathes the carbon dioxide in. It then travels around the body (Respiration) and the mother just replaces it with oxygen like normal.

I think this is right and hope its helps :)

The developing fetus is changing in size and shape, some more than others. Since it is not directly attached to the uterine wall, it can move about within the amniotic fluid of the womb, and can assume a variety of orientations. The umbillical cord has to be able to remain connected despite these positional changes, and to provide oxygen to the fetus as it moves outward through the birth canal during labor. Once the baby leaves the womb, the umbilical cord is cut, and the remaining cord is removed (part of the afterbirth).

The placenta develops from specialized cells of the embryo, which forms after conception ( becoming pregnant). The placenta grows along with the baby and reaches approximately 4cm in thickness and 18 cm in diameter near the time for delivery.( after 37 weeks of pregnancy). It grows because of its rich blood supply, and where this is interrupted, placental growth ( hence also the babys growth) slows giving a small baby and placenta. The placenta actually moves and sometimes can block the outcoming baby- this is now picked up early by scans. Hope it helps. Ravi

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