BCS 110 Lecture Notes - Lecture 7: Embryonic Stem Cell, Embryonic Disc, Neural Plate
9 Feb 2018
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Induction of the neural plate: neural proliferation, migration and aggregation, neuron death and synapse rearrangement - normal part of process. Axon growth and synapse formation: early development, ovum + sperm = zygote (fertilized egg) first cell divides after 30 hours. After three days, solid ball of cells (16-32) - called the morula. After five days, blastocyst - cells move apart around an inner cell mass, which will be the placenta around the embryo. Six days - implantation in the uterine wall. Eight days - embryonic disk - baby in a compact disc : potency: the ability to develop into different cell types. Fertilized egg: totipotent - can become anything in the future you and placenta cells. Cells on outer surface of the gastrula are called the ectoderm. The mesoderm is formed as additional cells migrate inward between the endoderm and ectoderm: 3 pluripotent layers. Endoderm - digestive tract, respiratory tract, liver, pancreas.
