BIOL 030 Lecture Notes - Lecture 7: Vellus Hair, Hypoblast, Subcutaneous Tissue
16 Sep 2020
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Development of extraembryonic membranes and bilaminar embryo. Define and describe: hypoblast, epiblast, primitive streak, primitive node, notochordal process, prochordal plate, cloacal plate, notochord, ectoderm, mesoderm, endoderm. Describe the formation of the bilaminar embryonic disc from the inner cell mass. Describe the formation of the extraembryonic mesoderm. Describe the formation of the primary and secondary yolk sacs. Describe the formation of the body (connecting) stalk. List three functions of the secondary yolk sac. Define and describe: lacuna, intervillous space, deciduas basalis, deciduas capsularis, deciduas parietalis, amnion, chorion. Describe the formation of the amnion and the chorion. Describe the morphological changes that occur during the development of placental villi. Describe the components of the placental membrane or barrier . Describe the formation of the amniotic fluid. List several functions of the amniotic fluid. Define amniocentesis and list several indications for the procedure. List and describe the morphology and function of the layers in the skin.
