Placenta

• Placenta is considered as what type of organ?

  Temporary organ
• Blastocyst: attaches to and implants in the endometrium of the uterus
• What are the 2 portions of Placenta?

  Fetal and Maternal
• Fetal portion: with branching chorionic villi; simple squamous epithelium
• Maternal portion: decidua basalis of the endometrium
• The ENDOMETRIUM becomes the DECIDUA if FERTILIZATION occurs.
• Decidua basalis: between the embryo and endometrium
• Decidua capsularis: surrounds the embryo
• Decidua parietalis: on the side of the uterus away from the embryo