menstrual cycle Flashcards
fertilisation in humans meaning
where the egg cell and the sperm cell fuse to create a zygote
fertilisation overall meaning
where the nuclei of the female gamete and the nuclei of the male gamete fuse to create a zygote
features of puberty in a male
-deep voice
-pubic hair
-hair under arms
-facial hair
-testes get larger
-penis gets longer and wider
-shoulders get wider
features of puberty in a female
-period starts
-hip bones wider
-pubic hair
-hair under arms
-skin gets oilier
-breasts develop
what happens during stage 1 of menstruation
if egg isn’t fertilised, uterus lining doesn’t shed isn’t needed so it sheds and the woman bleeds for 2-5 days (period)
what happens during stage 2 of menstruation
the uterus lining regrows
what happens during stage 3 of menstruation
matured egg waits to be released and fertilised by the man’s sperm.when released it is called ovulation
what happens during stage 4 of menstruation
the lining of the uterus thickens ready for a potential pregnancy
how long is the menstrual cycle
28 days-can be more or less
how long can a period last
2-5 days
when does ovulation take place
day 14
what happens if fertilisation doesn’t take place
the uterus lining breaks down and the cycle repeats
what happens if fertilisation does take place
the fertilised egg attaches to the uterus lining and becomes pregnant