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