Human Reproduction Flashcards
what is reproduction
it is the production of new people
the male gamete
the sperm cell
the female gamete
the egg cell
what is puberty
time in a persons life when they become sexually matue
what are the hormones in a fe/males body
testosterone
oestrogen
puberty in boys
begins about 12-13 yrs
sexual characteristics that develop are-
testicles and penis increase inn size
sperm are produced in testes
increased interest in girls
what are the physical characteristics that develop for men
growth of pubic hair,face, hair and hair elsewhere
sudden growth spurt in overall growth
chest deepens,shoulder broaden, a increase in muscle
larnx widens,causing the voice to break and deepen
spots may appear on skin,due to the over production of oil
puberty in girls
begins 11-12 sexual characteristics that develop- ovaries and womb increase in size the menstrual cycle begins interest in girls
physical characteristics that develop in girls
breasts grow hip widen pubic hair sudden spurt in overall growth spots may produce on skin due to overproduction of oils
what is the path of semen
the man places his erect penis into the mans vagina.this results in ejaculation
what is fertilisation
if an egg is present in the fallopian tube the eggs join the egg cell
fertilisation to pregnancy
the fertilised eggs divide a number of times.the time groups of cells move down the fallopian tube to the uterus. the group of cells then bury themselves into the lining of the womb. implantation. once implantation has taken place the women is pregnant
describe pregnancy
after implantation the baby becomes surrounded by a membrane called the amnion. the membrane fills up with amniotic fluid. last 9 months
what is amnion
it is the membrane that surrounds the baby
what is the liquid that amnion fills up with
amniotic fluid
describes the plancenta
passes oxygen and food from the mother’s blood to the baby
passes waste products from the baby to the mother
allows harmful substances to pass into the mother to the baby
what is the umbilical cord
connects placenta to baby at the belly button
describe the birth
muscles in the uterus start to contract. these contractions are called labour.the contractions cause the amnions to burst. the cervix widen with the contractions. the baby is pushed head first out of teh womb and into the vagine. the umbilical cord is clamped and cut
describe the aftrerbirth
uterus contracts after baby is born.. the remains if the placenta is pushed out of the vagina
describe contraception
preventing fertilisation by stopping egg from reaching the egg Example-condoms and coil
preventing an over from releasing an egg
example-implant,contraceptive pill
