Structure of Placenta
The labelled diagram of placenta shows the following structure:
- Maternal Side: The uterine lining, called the decidua basalis, attaches to the placenta and enables maternal-fetal exchange via spiral arteries.
- Maternal Decidua: The placenta’s basal plate forms from altered endometrial tissue, helping in placental adhesion.
- Fetal Side: Chorionic villi, projecting from the fetal chorion, compose the placenta’s fetal side, facilitating gas and nutrient exchange between fetal and maternal circulations.
- Fetal Chorionic Plate: Formed by chorionic villi, the fetal chorionic plate comprises decidua embedded within the villi.
- Villous Tree: The branching chorionic villi structure includes terminal, intermediate, and stem villi encircling fetal blood arteries.
- Intervillous Space: This space, filled with maternal blood, allows for mother-fetal communication via chorionic villi.
- Umbilical Cord: Comprising two umbilical arteries and one vein, it transports fetal blood to and from the placenta for nutrient and gas exchange.
- Amniotic Cavity: Surrounding the fetal side, the amniotic cavity contains amniotic fluid, protecting and cushioning the fetus.
- Placental Lobules: These functional units, divided by septa, contain clusters of chorionic villi for maternal-fetal communication.
- Maternal Circulation: Maternal blood enters the placenta via spiral arteries, filtering waste and supplying oxygen and nutrients before leaving through veins.
- Fetal Circulation: Fetal blood travels to the placenta through umbilical arteries. It exchanges nutrients and gases in placental lobules, and returns to the fetus via the umbilical vein.
Diagram of Placenta
The diagram of placenta shows that it is made up of fetal and maternal components. The placenta diagram with labels shows the umbilical arteries and veins for gas and nutrition exchange in the umbilical cord, which joins the fetus to the placenta. The placenta diagram in class 10 and class 12 textbooks shows its structure and is also asked in examinations.
The labeled diagram of the placenta is given below:
Placenta Diagram With Labels
Table of Content
- What is Placenta?
- Structure of Placenta
- Types of Placenta
- Placenta Diagram and Function
- Conclusion – Diagram of Placenta
- Related Diagram Article Links
- FAQs on Placenta Diagram