Download - Human reproduction 6th by Andrea del Hoyo
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reproductionby
ANDREA DEL HOYO
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REPRODUCTION Is the live processes that let living things create other
living things similar to them.
Human beings reproduce by sexual reproduction .
Humans are viviparous mammals
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Primary sexual features Male and female reproductive cells are made in the
male and female reproductive systems.
Primary sexual features are the traits that characterisethe male and female reproductive systems.
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Secondary sexual features Girls develop breast and their hips get wider.
Boys get deeper voices, they get facial hair and theirshoulders get wider.
Secondary sexual features develop during puberty
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Reproductive cells Reproductive cells or sex cells are the responsabile for
carrying out the funtion of reproduction.
-Ovule: is the female reproductive cell.They matureevery month since puberty.
-Sperm: is the male reproductive cell.They are constantly produced since puberty.
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Female reproductive systems It is made up of:
-Ovaries: they produce ovules.
-Uterus: a foetus develops inside it.
-Fallopian tubes: they take the ovule from theovaries to the uterus.
-Vagina: it is the canal that connects the uterus to theoutside of the body.
-Vulva: it is the outer part of the female reproductivesystem.
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Male reproductive sistem It is made up of:
-Testicles: they produce sperms.
-Urethra: it is the cannal that take the orine and thesperm outside the body.
-Vas deferens: they are two thin tubes that connectsthe testicles to the urethra.
-Seminal vesicles and prostate: they are glands.
-Penis: is the outer part of the male reproductivesystem.
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Fertilisation Is when the ovule and sperm join in one of the
fallopian tubes.
Menstruation occurs when the ovule is not fertilised.
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Development of an embryo It has three parts:
-The placenta: it takes nutrients and oxygen from themother´s blood and gives it to the baby.
-The umbilical cord: it connects the embryo to theplacenta.
-The amniotic sac: it is a membrane filled with fluid.
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Development of a foetus After three months: the embryo has all its organs
formed.
After five months: the mother can feel the baby’smovements.
After nine months: the baby is ready to be born.
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Child birth Is when the baby leaves his mothers womb.
It has three parts:
-Labour: rhythmic contractions dilate the uterus.
-Birth: the baby leaves the womb through the vagina.
-After birth: the placenta is expelled from themother’s womb.
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The end