Download - Reproductive Systems and Fertilization
Reproductive Systems and Fertilization
Ms. LawHealth and Medical Sciences
Meiosis Review How sperm and
eggs are produced.
Male Reproductive System
Male Reproductive System
Function: To produce and deliver sperm to the female system
Testes: Make sperm and testosteroneInside
scrotum
To Regulate temperature.Why?
Not until puberty
Produces secondary sex characteristics-deeper voice, pubic hair, facial hair, body hair
Male sex hormone
Journey of the Sperm Inside testes are Semineferous Tubules
where sperm are produced through meiosis Mature sperm leave and are stored in the
Epididymous Sperm leave Epididymous they travel
through the Vas Deferens where fluid is added to them Sperm + Fluid=Semen
Vas Deferens is connected to the Urethra. During Ejaculation the sperm travel from the Vas Deferens to the Urethra then are ejaculated
Journey of the Sperm Testes in
ScrotumSemineferous Tubules (produce sperm)Epididymous (store sperm)Vas Deferens (fluids added)urethraSemen (sperm + fluids) ejaculated
Female Reproductive System
Female Reproductive System
Function: produce eggs, nuture fertilized eggs, give birth
Ovaries: Mature eggs and produce estrogen
Girls are born with all of their eggs, but do not start to mature until puberty
Produces secondary sex characteristics
Female Sex Hormone
Journey of the Egg Ovary releases an Egg into the Fallopian
Tube (Ovulation) Egg travels down the Fallopian Tube
towards the uterus If fertilized, egg will implant in wall of
uterus and begin to grow into a baby If NOT fertilized, egg will die and be
flushed away with menstruation (period).
Journey of the Egg OvaryFallopian Tube Uterus
(thickened with blood and tissue to prepare for fertilization)
Fertilized-egg will implant in wall of uterus and begin to grow into a baby
Unfertilized-egg will die and be flushed out with menstruation (period)
Fertilization Occurs in the fallopian tube Egg is released during ovulation Sperm is released into vagina by ejaculation
during sexual intercourse Sperm swim through uterus toward fallopian tubes Egg and sperm join nuclei during fertilization Egg (23 chromosomes)+ Sperm (23
chromosomes)= Zygote (46 chromosomes) Egg blocks more than one sperm from entering
Fertilization
Fertilization
Embryo Development After fertilization, zygote travels to uterus
where it implants-attaches to the wall Fertilized egg is dividing over and over Now called an embryo Placenta forms-provides the baby with
oxygen and nutrients from mom’s blood and removes waste
Embryo Development Embryo is surrounded by the
amnionfluid filled sac protects the baby Umbilical cord forms and attaches to
placenta-exchange of oxygen nutrients and wastes
Mom’s blood and baby’s blood never actually mix!
Embryo Development
Embryo Development
Embryo Development 1-2 months brain, spinal cord,
limb buds 3-6 months Movement,
fingernails, toenails, eyes, can hear sounds outside the womb
7-9 months lungs practice breathing, see light, sleeping patterns
9-10 months Birth