Cool Science Experiments For Kids This site contains some science experiments for kids to do @home or school
  • How Do I Come To This World?

    0
    scissors
    March 14th, 2009CTBiology

    Children come from fusion of (or make simple meet up with) mama’s ovum and dad’s sperm known as zygote. So, how does ovum and sperm meet in the first place?

    Race of the Sperms

    Through sexual intercourse, sperms in dad’s reprodcutive organ will flow into mama’s reproductive organ (into the Ovari, which release a ovum). There will 200 – 300 million sperms rushing to the ovum, only one race winner will meet up with ovum to form zygote.

    Sperms Rushing Towards Ovum

    Sperms Rushing Towards Ovum

    Only one sperm can go into ovum to complete the fusion.
    There is only one winner

    There can only one winner

    To become a embryo, zygote divide into two, then two become four,and it keeps repeatedly divide, and being push to the uterus at the same time.
    Zygote Starts To Dividing

    Zygote Starts To Dividing

    Until the eighth day, the dividing zygote implants itself on the wall of the uterus and make a home there.
    Zygote sticks itself onto uterus wall

    Zygote sticks itself onto uterus wall

    Next, zygote become an embryo. Withins 3 weeks, embryo can grow up to 2mm long
    Zygote Turns Into Embryo

    Zygote Turns Into Embryo

    Four weeks later, embryo becomes 1 cm long, and bones and brain is developed.
    Next, embryo starts to grow bones and brain

    Next, embryo starts to grow bones and brain

    Eight weeks later, embryo grows up to 4cm long, it starts to grow limbs and organs….becoming a feotus.
    Embryo grows limbs and organs

    Embryo grows limbs and organs

    3 months later, feotus starts to grow hair.
    Hair starts to grow on foetus

    Hair starts to grow on foetus

    Come the fourth month, we will know is it a boy or a girl?
    Time to know...Boy or Girl?

    Time to know...Boy or Girl?

    Starting from the fourth month, mama will feel the moving feotus in her stomach
    Mama can feel her baby moving

    Mama can feel her baby moving

    Seventh month, feotus will turn in the uterus and it will keep the up side down position until it is borned… the feotus’s body is filling up the whole uterus.
    Almost time to come out!

    Almost time to come out!

    By the tenth month, mama will giving birth to a new born baby!
    A baby is born!

    A baby is born!

Comments are closed.