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Trabajo reproducción lucia y yael

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The document summarizes human reproduction and development. It discusses sexual reproduction, primary and secondary sexual characteristics, reproductive cells, and the male and female reproductive systems. It also describes fertilization, pregnancy, and the three phases of labor and birth. Key points include that humans reproduce sexually, puberty brings physical changes like growth of breasts or facial hair, and pregnancy lasts about 9 months before birth.

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Trabajo reproducción lucia y yael
Reproduction Living things create other living things in the process of reproduction. Human beings reproduce through sexual reproduction, bringing male and female sex cells together.
Primary sexual characteristics The reproductive systems are the primary sexual characteristics. We already have them when we are born and different for male and female.
Secondary sexual characteristics The external characteristics which differentiate men from women are called secondary sexual characteristic During puberty, between the ages of eleven and fifteen, the reproductive system matures. Some physical changes are the same for both sexes, like growing taller or hair growing in the armpit. Other changes are specifics to each sex:  Girls develop breasts and their hips get wider.  Boys get deeper voices.
Trabajo reproducción lucia y yael
Reproductive Cells Sperm Ova Sperm are the male reproductive cells. They are small. They have a head and a long tail called flagellum. They are produced in large numbers form the time of puberty. Ova are the female reproductive cells. They do not move. From puberty, an ovum maturates every month.
The Reproductive System: The female reproductive system The female reproductive system is made up of these organs:  The ovaries produce the ova.  The uterus is where the baby develops.  The fallopian tubes connect the ovaries to the uterus.  The vagina connects the uterus to the outside of the body.  The vulva is the external part of the female reproductive system.
Trabajo reproducción lucia y yael
The Reproductive System: The male reproductive system The male reproductive system is made up of these organs:  The testicles are outside the body. They produce sperm. They are covered by a bag of skin called the scrotum.  The vas deferens take sperm from the testicles to the urethra.  The urethra takes the sperm outside the body.  The seminal vesicles and prostate produce seminal fluid and send it to the urethra.  The penis is outside the male reproductive system.
Trabajo reproducción lucia y yael
Fertilisation Fertilisation occurs when an ovum and a sperm join inside the fallopian tubes and they create a single cell called zygote. The zygote goes down the fallopian tubes, it is implanted in the wall of the uterus and it becomes an embryo.
Pregnancy And Birth: Pregnancy Pregnancy lasts about 9 moths and ends in a birth. During the early stages, different structures are created to protect the embryo.  The placenta takes nutrients and oxygen from the mother´s blood to the embryo.  The umbilical cord connects the embryo to the placenta.  The amniotic sac protects the embryo.
Pregnancy And Birth: Pregnancy The baby develops step by step:  After 3 months: The embryo has all its organs. It becomes a foetus.  After 5 months: the baby´s body develops and it stars moving and the mother feels it.  After 9 months: the baby is ready to be born and weighs around 3 kilos.
Pregnancy And Birth: Labour The process of giving birth is called labour. Labour takes place in three phases:  Dilation: rhythmic contractions make the opening of the vagina and vulva big enough for the baby to come out.  Expulsion: the baby is born and the doctor outs umbilical cord.  Afterbirth: the placenta comes out of the mother´s body.
For: Lucía Bueno and Yael Barcenilla

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Trabajo reproducción lucia y yael

  • 2. Reproduction Living things create other living things in the process of reproduction. Human beings reproduce through sexual reproduction, bringing male and female sex cells together.
  • 3. Primary sexual characteristics The reproductive systems are the primary sexual characteristics. We already have them when we are born and different for male and female.
  • 4. Secondary sexual characteristics The external characteristics which differentiate men from women are called secondary sexual characteristic During puberty, between the ages of eleven and fifteen, the reproductive system matures. Some physical changes are the same for both sexes, like growing taller or hair growing in the armpit. Other changes are specifics to each sex:  Girls develop breasts and their hips get wider.  Boys get deeper voices.
  • 6. Reproductive Cells Sperm Ova Sperm are the male reproductive cells. They are small. They have a head and a long tail called flagellum. They are produced in large numbers form the time of puberty. Ova are the female reproductive cells. They do not move. From puberty, an ovum maturates every month.
  • 7. The Reproductive System: The female reproductive system The female reproductive system is made up of these organs:  The ovaries produce the ova.  The uterus is where the baby develops.  The fallopian tubes connect the ovaries to the uterus.  The vagina connects the uterus to the outside of the body.  The vulva is the external part of the female reproductive system.
  • 9. The Reproductive System: The male reproductive system The male reproductive system is made up of these organs:  The testicles are outside the body. They produce sperm. They are covered by a bag of skin called the scrotum.  The vas deferens take sperm from the testicles to the urethra.  The urethra takes the sperm outside the body.  The seminal vesicles and prostate produce seminal fluid and send it to the urethra.  The penis is outside the male reproductive system.
  • 11. Fertilisation Fertilisation occurs when an ovum and a sperm join inside the fallopian tubes and they create a single cell called zygote. The zygote goes down the fallopian tubes, it is implanted in the wall of the uterus and it becomes an embryo.
  • 12. Pregnancy And Birth: Pregnancy Pregnancy lasts about 9 moths and ends in a birth. During the early stages, different structures are created to protect the embryo.  The placenta takes nutrients and oxygen from the mother´s blood to the embryo.  The umbilical cord connects the embryo to the placenta.  The amniotic sac protects the embryo.
  • 13. Pregnancy And Birth: Pregnancy The baby develops step by step:  After 3 months: The embryo has all its organs. It becomes a foetus.  After 5 months: the baby´s body develops and it stars moving and the mother feels it.  After 9 months: the baby is ready to be born and weighs around 3 kilos.
  • 14. Pregnancy And Birth: Labour The process of giving birth is called labour. Labour takes place in three phases:  Dilation: rhythmic contractions make the opening of the vagina and vulva big enough for the baby to come out.  Expulsion: the baby is born and the doctor outs umbilical cord.  Afterbirth: the placenta comes out of the mother´s body.
  • 15. For: Lucía Bueno and Yael Barcenilla