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PSYB32H3 (1,174)
Chapter 3

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Department
Psychology
Course
PSYB32H3
Professor
Diane Mangalindan
Semester
Fall

Description
Stages of Prenatal Development -occurs in 3 stages: 1. zygote 2. embryo 3. fetus Zygote  during first 2 weeks of life  implants itself into the wall of the uterus Embryo  begins when zygote is firmly plants in uterus (3rd week to 8th)  by the end, has face, genitalia, fingers and toes  most miscarriages happen during this period  3 crucial structures develop o amniotic sac o placenta o umbilical cord  amniotic sac o membrane around organism o contains the amniotic fluid that acts like a shock absorber  placenta o embryo is joined to the placenta by the umbilical cord o placenta is the tendrils that attach the embryo to the uterine o semi-permeable membrane, therefore, it is possible for some substances to pass thro
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