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Biology - Human Reproduction Shortened (Menstrual Cycle (Occurs in women…
Biology - Human Reproduction Shortened
Development of a fetus
4 weeks - 1cm
6 weeks - 3cm
10 weeks - 6cm
16 weeks - 12cm
Baby turned - 16cm
Reproductive Systems
Male
Glands
Semen created
Sperm ducts
Delivers sperm to urethra
Penis
Muscle - holds urethra
Urethra
Tube - lets out urine
Testis
Ball - sperm produced
Scrotum
Bag - testis stored
Female
Oviduct
Tube - eggs travel
Ovary
Bags - eggs stored
Uterus
Baby develops
Cervix
Tube - border, vagina and uterus
Vagina
Tube - penis inserted into
Urethra
Tube - lets out urine
Menstrual Cycle
Occurs in women after puberty
First sign - period starts
Once a month
Egg released from ovary
Egg not fertilized - ovary lining shed
Period usually 3-7 days
Adolescence
Female
Breasts develop
Pubic hair
Hips widen
Periods start
Ovaries make eggs
Ovaries produce sex hormones
Male
Pubic hair
Voice breaks
More hair
Testis and penis bigger
Shoulders widen
Testis produce sperm
Testis make sex hormones
Fertilization and implantation
Baby - male ejaculates into vagina
Sperm, egg share chromosomes
23 + 23 = 46