Your SlideShare is downloading. ×
0
Human reproduction by Sacha
Human reproduction by Sacha
Human reproduction by Sacha
Human reproduction by Sacha
Human reproduction by Sacha
Human reproduction by Sacha
Human reproduction by Sacha
Human reproduction by Sacha
Human reproduction by Sacha
Human reproduction by Sacha
Human reproduction by Sacha
Human reproduction by Sacha
Human reproduction by Sacha
Human reproduction by Sacha
Human reproduction by Sacha
Human reproduction by Sacha
Human reproduction by Sacha
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Human reproduction by Sacha

491

Published on

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
491
On Slideshare
0
From Embeds
0
Number of Embeds
3
Actions
Shares
0
Downloads
7
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. HUMAN REPRODUCTION SACHA HERRERO GIRALDO 6·A
  • 2. REPRODUCTION  Living things create other living things in the process of reproduction . Human beings reproduce through sexual reproduction.
  • 3. PRIMARY SEXUAL CHARACTERISTICS  The reproductive system are the primary sexual characteristics . We alredy have them when we are born and there are different for male and female.
  • 4. SECONDARY SEXUAL CHARACTERISTICS The external characteristics which differentiate men from women are called secondary sexual characteristics. 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 charges and specific to each sex: Girls develop breasts and their hips get wider. Boys get deeper voices.
  • 5. REPRODUCTIVE CELLS Reproductive cells carry out the function of reproduction.  Sperm are the male reproductive cells. They are small. They have a head and a long tail called a fragellum. They are produced in large numbers from the time of puberty.  Ova are the female reproductive cells. They do not move. From puberty, an ovum matures every month.
  • 6. THE FEMALE REPRODUCTIVE SYSTEM The female rproductive system is made up of these organs : The ovaries produce the ova. The uterus is where the baby develops. The fallopian tubes connect the ovarios to the uterus. The vagina connects the uterus to the outside of the body. The vulva is the external part of the female reproductive cells.
  • 7. 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.
  • 8. FERTILISATION Fertilisation occurs when an ovum and a sperm join inside the Fallopian tubes and they create a single cell called a zygote. The zygote goes down the Fallopian tubes, it is implanted in the wall of the uterus and it becomes an embryo.
  • 9. PREGNANCY Pregnancy lasts about 9 months 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. 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 starts moving and the mother feels it.  After 9 months: the baby is ready to be born and it weighs around 3 kilos.
  • 10. 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 cuts the umbilical cord.  Afterbirth: the placenta comes out of the mother`s body.
  • 11. THE END

×