| Print Date: | September 2, 2010, 6:45 pm |
| Title | 5 Minute Embryology Stages |
| Text | » Fertilization - Union of an egg and the head of a sperm cell
» Cell division » Blastosphere - a solid sphere of cells (AKA "morula") » Blastocyst - a cavity forms (the 'blastocele") creating a hollow sphere • Cells on the outside become the Trophoblast • Cells on the inside are the Embryoblast » Trophoblast cells invade the uterine wall, stimulating angiogenesis to develop the placenta » Blood vessels begin to develop in the embryo » Primitive Streak - A line of cells forms in the embryonic disc » Gastrulation - The two layered disc develops an inner - third - layer of cells » Neurulation - The top layer (ectoderm) thickens in the midline. The Notochord develops between the Embyronic Disc and the Yolk Sac. • The Neural Plate thickens around a central Neural Groove • Neural Tube begins to close near the center of the embryo • Somites form on either side of the closing tube ======================================= http://cats.med.uvm.edu/cats_teachingmod/embryology/1_3/week_3/notochordal.html http://isc.temple.edu/marino/embryology/lecture1-3.htm |
| References: | |
| Contributor | James George Smirniotopoulos, M.D. (Uniformed Services University) |
| Peer Reviewer | James George Smirniotopoulos, M.D. (Uniformed Services University) |
| Record Number | : 6298 |
| Created | 2005-01-22 14:23:58-05 |
| Modified | 2005-04-26 06:22:13-04 |
| Category: | Embryology |
| Location: | Generalized |
| Sublocation: | None Selected |
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