what is a placenta how does it is formed
Answers
Answer:
- Placenta refers to the temporary vascular organ found in mammals, which attaches the fetus to the uterus of the mother during pregnancy. The placenta is the passage that unites the fetus to the mother.
- The implantation of the blastocyst commences the development of placenta. The 32-64 cell blastocyst has – the inner cell mass and the outer trophoblast cells. These trophoblast cells form placenta while the inner cell mass goes on to form the foetus and the various foetal membranes. The placenta is fully formed by 18-20 weeks, however, it continues to grow all through the pregnancy.
Answer:
The placenta is the nutritive organ formed during pregnancy to provide nutrition to the developing baby. It is formed by the trophoblast cells.
Explanation:
The placenta is the structure that provides oxygen and nutrients to the developing baby and also helps in discarding the waste produced by the baby.
The placenta is attached to the wall of the uterus of the mother. It links the baby with the mother.
The baby is attached to the placenta via the umbilical cord.
During the development of the embryo, there are two types of cells produced. One is the outer trophoblast cells and another is inner cell mass.
The trophoblast cells give rise to the placenta and the inner cell mass gives rise to the foetus.
The following are the functions of the placenta:
- Exchange of gases
- Transfer of metabolic products
- Secretion of hormones
- Protection of foetus