Embryo develops from zygote in the female body after the fertilization of ovum (female gamete) by sperm (male gamete). The zygote undergoes cell division and forms a blastocyte. The blastocyte further divides and develops into an embryo. The embryo, with time, develops well differentiated and specialized cell types that make up tissues and organs for a fetus development.
The embryo gets nourishment inside the mother's body through the placenta.
- The placenta is an organ that develops inside the uterus during pregnancy.
- It is a disc shaped tissue that acts as a link between the mother's blood supply and the developing fetus.
- The placenta is attached to the uterine wall and is connected to the fetus by the umbilical cord.
- On the side of the embryo, the placenta comprises villi, while on the mother's side, it is surrounded by blood vessels.
- The placenta facilitates the transfer of glucose and oxygen from the mother's blood to the developing fetus.
- Additionally, the placenta produces several hormones that are vital for a healthy pregnancy.
- The umbilical cord contains blood vessels that allow nutrients and oxygen to be delivered from the mother's bloodstream to the fetus.
- The waste products are removed from the fetal bloodstream and eliminated through the mother's excretory system.
- These hormones include human chorionic gonadotropin (hCG), which is produced in the early stages of pregnancy, and progesterone and estrogen, which are produced later on.
Overall, the placenta plays a crucial role in supporting the growth and development of the fetus during pregnancy, and its proper function is essential for a healthy pregnancy and delivery.
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