By Maria By Maria Toranzo Toranzo SesmaSesma

Primary sexual Primary sexual characteristicscharacteristics

• The reproductive system are the The reproductive system are the primary sexual characteristics.We primary sexual characteristics.We already have them when we are born already have them when we are born and they are different for male and and they are different for male and female. female.

Secondary sexual Secondary sexual characteristicscharacteristics

• The external characteristics which The external characteristics which differentiate men from women are differentiate men from women are called secondary sexual called secondary sexual characteristics.characteristics.

• Girls develop breasts and their hips get Girls develop breasts and their hips get wider.wider.

• Boys get deeper voices.Boys get deeper voices.

Reproductive cellsReproductive cells• Sperm:are the male reproductive Sperm:are the male reproductive

cells.They are small.They have a head cells.They are small.They have a head and a long tail called flagellum.They and a long tail called flagellum.They are produced in large numbers from are produced in large numbers from the time of puberty.the time of puberty.

• Ova:are the female reproductive Ova:are the female reproductive cells.They do not move.From puberty, cells.They do not move.From puberty, an ovum matures every month.an ovum matures every month.

The female reproductive The female reproductive systemsystem• The ovaries produce the ova.The ovaries produce the ova.• The uterus is where the baby The uterus is where the baby

develops.develops.• The Fallopian tubes connect the The Fallopian tubes connect the

ovaries to the uterus.ovaries to the uterus.• The vagina connects the uterus to the The vagina connects the uterus to the

outside of the body.outside of the body.• The vulva is the external part of the The vulva is the external part of the

female reproductive system.female reproductive system.

The female reproductive The female reproductive systemsystem

The male reproductive The male reproductive systemsystem• The testicles are outside the body.The testicles are outside the body.• The vas deferens take sperm from the The vas deferens take sperm from the

testicles to the urethra.testicles to the urethra.• The urethra takes sperm outside the body.The urethra takes sperm outside the body.• The seminal vesicles and prostate produce The seminal vesicles and prostate produce

seminal fluid and send it t the urethra.seminal fluid and send it t the urethra.• The penis is outside the male reproductive The penis is outside the male reproductive

system.system.

The male reproductive The male reproductive systemsystem

FertilisationFertilisation

• Fertilisation occurs when an ovum Fertilisation occurs when an ovum and a sperm joint inside the fallopian and a sperm joint inside the fallopian tubes and they create a single cell tubes and they create a single cell called zygote.The zygote goes down called zygote.The zygote goes down the fallopian tubes, it is implanted in the fallopian tubes, it is implanted in the wall of the uterus and it becomes the wall of the uterus and it becomes an embryo.an embryo.

PregnancyPregnancy

Pregnancy lasts about 9 months and ends Pregnancy lasts about 9 months and ends in a birth.in a birth.

During the early stages, different During the early stages, different structures are created to protect the structures are created to protect the embryo.embryo.

• The placenta:takes nutrients and oxygen The placenta:takes nutrients and oxygen from the mother´s blood to the embryo.from the mother´s blood to the embryo.

• The umbilical cord:connects the embryo The umbilical cord:connects the embryo to the placenta.to the placenta.

• The amniotic sac protects the embryo.The amniotic sac protects the embryo.

PregnancyPregnancy

The baby develops step by step:The baby develops step by step:

• After 3 months:the embryo has all its After 3 months:the embryo has all its organs.It becomes a foetus.organs.It becomes a foetus.

• After 5 months:the baby´s body After 5 months:the baby´s body develops and it starts moving and develops and it starts moving and the mother feels it.the mother feels it.

• After 9 months:the baby is ready to After 9 months:the baby is ready to be born and it weighs around 3 kilos.be born and it weighs around 3 kilos.

PregnancyPregnancy

Labour Labour

The process of giving birth is called The process of giving birth is called labour.labour takes place in three labour.labour takes place in three phases:phases:

• Dilation:rhythmic contractions make Dilation:rhythmic contractions make the opening of the vagina and vulva the opening of the vagina and vulva big enough for the baby to come out.big enough for the baby to come out.

• Expulsion:the baby is born and the Expulsion:the baby is born and the doctor cuts the umbilical cord.doctor cuts the umbilical cord.

• Afterbirth:the placenta comes out of Afterbirth:the placenta comes out of the mother´s body.the mother´s body.

LabourLabour