human reproduction by paula crespo
TRANSCRIPT
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SCIENCE
Paula Crespo González
HUMAN
REPRODUCTION
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REPRODUCTION
Reproductive is a life process that lets living things create other living things that are similar to them .
Human beings have a sexual reproduction in which male and female sex cells unite
Humans are viviparous mammals
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PRIMARY SEXUAL FEATURES
Primary sexual features are the traits that characterise the male and female reproductive systems .
The different traits of each reproductive systems are called primary sexual features.
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Secundary sexual features Secundary sexual features
develop during puberty . There are other changes that
are specific to each sex: - Girls develop breats and
their hips get wider. - Boys get deeper
voices ,they get facial hair and their shoulders get wider.
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Reproductive cells
- Ovules : They are femaleReproductive cells . They are big
and round .- Sperm: they are male
reproductive cells.They are small.
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Female reproductive system
Ovaries: They produce ovules Uterus: A foetus develops inside it Vagina: it is the canal that
connects the uterus to the outside of the body
Vulva: It is the outer part of the female reproductive system. It is made up of folds of skin called labia that protect the entrance to the vagina
Fallopian tubes: They connect the ovaries to the uterus
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Female reproductive system
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Male reproductive system
Testicles: They are outside a male’s body . They produce sperm.
Vas deferents: They are two thin tubes that take the sperm from the tescicles to the urethra . They are inside the abdomen
Uretha: it is the tube that takes urine or sperm outside the body.
Penis :It is outside the male reproductive system .the urethra is inside it
Seminal vesical and prostate: They are glands that produce seminal fluid and send to the urethra
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Male reproductive system
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Fertilisation
Fertilisatin is the union of sperm and ovule in one of the Fallopian tubes. Menstruation occurs if the ovule is not fertilised
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The develop of an embryo
During the early stages of pregnancy, different structures are created to protect the baby:
- The placenta.It is a spongy organ that is connected to the wall of the uterus.
-The umbilical cord.It is made up of blood vessels an d connects the embryo to the placenta.
-The amniotic sac.it is a membrane filled with fluid that protects the embryo.
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The development of an embryo
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E N D
By Paula Crepo