NURS 106 Lecture Notes - Lecture 38: Human Placental Lactogen, Corpus Luteum, Umbilical Cord
7 Dec 2018
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Document Summary
F orms shortly after fertilization, eventually implanting in the endometrial lining. Keeps corpus luteum active a placenta will form placenta then releases hcg. Hcg active corpus luteum corpus luteum will decompose the placenta produces progesterone placenta produces relaxin and human placental lactogen. The study of events that occur during prenatal development: pre embryonic development . Begins at fertilization and continues through cleavage and formation of embryonic tissue first 2 weeks: embryonic development . Which extends from implantation to the end of the eighth developmental week. 6 weeks period differentiation of germ layers into organs formation of embryonic membranes formation of placenta and umbilical cord. 3rd to 8th week (6 weeks long) bilaminar embryonic disc . Yolk sac early site for blood cell formation. Forms epithelial lining of gi and respiratory tract. Forms muscle, bone and other connective tissues. Develops into epidermis of skin and nervous system. A pouch that extends from the hypoblast cells into blastocoele and is the.
