Body Systems: Reproductive System.

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Presentation transcript:

Body Systems: Reproductive System

The Endocrine System & the Nervous System Both regulate body activities Nervous system uses nerve impulses Endocrine system uses chemicals = hormones

Sexual Reproduction: sperm egg cell Baby Human Male Female

Fertilization: the joining of a sperm & egg Only 1 sperm penetrates the egg As soon as 1 sperm penetrates the egg, the wall thickens to keep out competing sperm

The Male Reproductive Structures: testes scrotum penis

Male Sex Cell= Sperm swim using tails carried in fluid called semen 5-10 million sperm per drop of semen

The Female Reproductive Structures: ovaries fallopian tubes uterus vagina

Female Sex Cell= Egg 1 egg released per month 400,000 eggs stored in ovaries 500 will be released in lifetime

Menstrual Cycle: Monthly Cycle of changes Keep it ready for pregnancy which begins after fertilization Ovulation Menstruation

Menstrual Cycle: As you watch, try to identify: ovulation egg moving through fallopian tube thickening of the lining of the uterus unfertilized egg entering uterus the sloughing off of the lining of the uterus