REPRODUCTION IN HUMANS Flashcards
definition of sexual reproduction
production of genetically dissimiliar offspring through the fusion of the nuclei of the male and female gametes to form a zygote
what is fertilisation
a mating process is required for the sperm to fuse with an egg
fusion of male and female gamete to form zygote
how many chromosomes do gametes have
23 chromosomes
function of sperm duct
leads from testes to urethra
sperm travels through sperm ducts after being released from a testis
function og testis
produce sperms and male sex hormones such as testerone
function of male sex glands
allows sperms to become active and mixture of fluid and sperm called semen
function of urethra
tube that allows the passage of semen which is ejaculation and urine out of the body
function of scrotum
sac that hangs outside body
function of uterus
place where fetus develops
elastic muscular walls that contract pto push baby out
function of ovary
produuces eggs and female sex hormones
funmction of oviduct
cilia on the inner walls of the fallopian tube that help m, move the egg along the tube towards the uterus
site of fertilisaiton
uterine lining?
thickness changes over mesntrual cycle
what is the mensrual cycle
when blood and uterine lining is discharged from vagina whcih is known as mesntruation
stages of menstruation
uterine lining breaks down and is discharged through the vagina
repair and growth of uterine lining, oestrogen is produced by the ovary which causes the uterine lining to repair itself and grow in thickness
ovulation, release of a mature egg from the ovary to oviduct
further thickening, progesterone further thickens the uterine lining and causes it to be more vascularized
what happens if fertilisation does not occur
progesterone no longer secreted
uterine lining breaks down and not maintained
