PSYC 2450 Chapter Notes - Chapter 4: Malnutrition, Teratology, Aspirin

• School: University of Guelph
• Department: Psychology
• Course: PSYC 2450
• Professor: Anneke Olthof

Document Summary

After fertilization until implantation into the uterine wall. Cells multiply via mitosis to form a ball-shaped blastocyst. The inner layer (embryonic disk) becomes the embryo. The outer layer develops into tissues that protect and nourish the embryo. Implantation: burrlike tendrils burrow into the uterine wall and tap into the mother"s blood supply. Development of support systems: outer layer forms: Amnion watertight membrane surrounding the developing embryo, regulates temp and cushions against injury. Chorion membrane that attches to the uterine tissues to gather nourishment for the embryo. Placenta an organ, formed from the lining of the uterus and the chorion, that provides for respiration and nourishment of the unborn child and the elimination of its metabolic wastes. Umbilical cord a soft tube containing blood vessels that connects the embryo to the placenta. From implantation (week 3) to week 8. Neural tube forms the brain and spinal cord in the 3rd week.