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March 24_Sex - Sex Development Germinal Period last the...

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March 24, 2008 Sex Development Germinal Period- last the first 2 weeks of pregnancy… we are called ZYGOTE - Being one fertilized egg to multiple cells (umbilical cord) Embryonic Period- 3 rd week to 8 th week… we are called EMBRYO - Cells specialize, develop organs, also arms legs and so on - Teratogen- anything that can cause birth defects (smoking, alcohol, not enough nutrients, falling, hot water, caffeine, radiation, cocaine, weed) o Cause the most damage in critical periods (foundation) when each system begins to develop Fetal Period - Foundation is set - When everything continues to grow - Known as the FETUS - Sex organs don’t develop until week seven - All start of as females then in week 7, develop Primary and Secondary Sex Characteristics 1. What we are born with (penis or vagina) 2. Puberty (pubic hair, breast development) 3. Primary are directly involved in reproduction 4. Secondary are not necessary for reproduction SEX Vs. GENDER Sex- physical characteristics of a person Gender- psychological characteristics (masculine or feminine). Influenced by biology
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