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Human reproduction
 

Human reproduction

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    Human reproduction Human reproduction Presentation Transcript

    • REPRODUCTION Definition Primary sexual characteristics Secondary sexual characteristics Reproductive cells Next
    • Definition Human beings reproduce through sexual reproduction, bringing male and female sex together. Return
    • Primary sexual characteristics We already have them when we are born and they are different for male a female. Return
    • Secondary sexual characteristics This characters are the external characteristics which differentiate men from women an appear during puberty with some physical changes. Return
    • Reproductive cells Carry out the function of reproduction: •Sperm •Ovary Are the male reproductive cells Are the female reproductive cells Return
    • THE REPRODUCTIVE SYSTEM The female reproductive system The male reproductive system Fertilisation Next
    • The female reproductive system Is made up of these organs: Fallopian tubes uterus vulva Return ovary vagina
    • The male reproductive system Is made up of these organs: urethra penis vas deferens Return seminal vesicles prostate scrotum testicle
    • Fertilisation Occurs when an ovum and sperm join and they create a cell called zygote. Return It is implanted in the wall of the uterus and it become an embryo.
    • PREGNANCY AND BIRTH Pregnancy, protective structures Pregnancy, baby development Birth, labour Next
    • Pregnancy, protective structures During the pregnancy different structures are create to protect the embryo. Placenta: takes nutrients and oxygen. Umbilical cordon: connects the embryo to the placenta. Amniotic sac: protects the embryo. Return
    • Pregnancy, baby development • After 3 months: the embrion has all its organs. It becomes an foetus • After 5 months: the foetus starts moving • After 9 months: is ready to be born Return
    • Parts of the labour 1 2 3 Dilation: the contractions make the opening of the vagina and vulva big enough for the baby to come out. Expulsion: the baby is born. Afterbirth: the placenta comes out of the mother’s body. Return 1 2 3
    • • ALVARO M. • HELENA • ALEX • MARCOS FIN