Human Development Notes 5

Human Development Notes 5 - Click to edit Master subtitle...

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Unformatted text preview: Click to edit Master subtitle style Prenatal Development and Birth Conception • Ovulation  At least one ovum is released during the menstrual cycle.  Average cycle is _____________.  Women ovulate around 13 times a year. ▫ Equates to ________ ova in 37 years of reproduction. • Spermatogensis  How sperm develops.  _______ sperm produced per second.  It takes 72 days to produce a mature sperm cell (spermatozoa).  Lots of sperm are released during ejaculation Fertilization • Ova must be fertilized by sperm within _________ after ovulation.  Out of the millions of sperm release, only 100-1,000 reach the egg.  The journey to the ovum eliminates the genetically weak sperm.  Sperm is viable for about ________. • Fertilization officially happens when a sperm penetrates the outer Conception and Implantation Stages of Prenatal Development • Germinal Stage   Around 2 weeks. • Embryonic Stage   Most critical time in development ▫ Major organs develop • Fetal Stage   Further development of organs. Germinal to Embryonic Stage • Amnion  Membrane that grows over the embryo.   Provides shock-absorbing protection for the embryo....
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Human Development Notes 5 - Click to edit Master subtitle...

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