sexual reproduction in humans Flashcards
what is the role of the placenta
it provides oxygen and nutrients for the baby and takes away waste via diffusion
why is the placenta vital to a foetus’s developement
allows exchange of materials
in - oxygen, amino acids, glucose, mineral ions, salts
out- carbon dioxide and urea
which hormone does the placenta release
progesterone- maintains pregnancy and prevents uterus lining from disappearing
what is the amion
it is a membrane that encloses the developing foetus. This secretes a fluid called amniotic fluid which protects the baby
where does fertilisation occur
in the fallopian tube
what are the hormones are involved in puberty
oestrogen and testosterone - sex hormones
progesterone, LH, FSH
name secondary sex characteristics in puberty ( girls and boy )
girls - breasts, pubic hair, period, hips widen, grow
boys- voice breaks, pubic hair, grow, sperm production, sex drive
