KINESIOL 3U03 Study Guide - Final Guide: Intellectual Disability, Caffeine, Alcoholic Drink

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Cf no good air exchange b/c mucus, trying to fix cfdr this stem cell stuff genes using. Xx = genetic female, xy = genetic male: 6 weeks gestation primitive gonad can develop into female or male, 7 weeks gestation. Active differentiation of male = testes development + testosterone / dihydrogytestosterone / mullerian suppression factor. Absence primitive gonad differentiates into ovaries 13 weeks (fetal) Sry turns primitive gonad into a male if active at 7 weeks gestation. Fetal: weeks 9 through 40, rapid growth size and mass, proportional change major proportion changes in the last 31 weeks. 2 month fetus, head occupies 50% of body. Fully grown young adults, head occupies 12: tissue development no new tissues, just development of organs and systmes. Figure 2. 3 prenatal growth in body weight and length: weight at 20 weeks is 10% of final weight, height is about 50% of final length at birth (26 cm / 52)

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