Humeral fractures

Human Placenta

The Human Placenta is a vital organ that develops in the uterus during pregnancy. It provides oxygen and nutrients to the growing fetus, while also removing waste products from the fetus's blood. The placenta attaches to the wall of the uterus, and the fetus's umbilical cord arises from it.

Structure

The human placenta is a disc-shaped organ with a diameter of about 22 cm and a thickness of about 2.5 cm in the center. It consists of a fetal side, covered by the amnion and a maternal side, from which the umbilical cord emerges.

Function

The primary function of the human placenta is to supply the fetus with oxygen and nutrients and to remove waste products. It also produces several hormones including human chorionic gonadotropin (hCG), progesterone, and estrogen which are essential for maintaining pregnancy and preparing the mother's body for breastfeeding.

Development

The development of the placenta begins with implantation of the blastocyst, a very early stage of the embryo, into the wall of the uterus. The outer layer of the blastocyst, known as the trophoblast, gives rise to the placenta.

Health Issues

Several health issues can affect the human placenta, including placenta previa, placenta accreta, and placental abruption. These conditions can cause serious complications during pregnancy and childbirth, and may require medical intervention.

See Also

• Pregnancy
• Uterus
• Fetus
• Umbilical cord
• Amnion
• Human chorionic gonadotropin
• Progesterone
• Estrogen
• Blastocyst
• Trophoblast
• Placenta previa
• Placenta accreta
• Placental abruption