Human reproduction is any form of sexual reproduction resulting in a zygote, it involves sexual intercourse between a man and a woman. During sexual intercourse, the interaction between the male and female reproductive systems results in fertilization of the woman's ovum by the man's sperm. These are specialized reproductive cells called gametes, created in a process called meiosis. While normal cells contains 46 chromosomes, 23 pairs, gamete cells only contain 23 chromosomes, and it is when these two cells merge into one zygote cell that genetic recombination occurs and the new zygote contains 23 chromosomes from each parent, giving them 23 pairs. After a gestation period, typically for nine months, is followed by childbirth. The fertilization of the ovum may be achieved by artificial insemination methods, which do not involve sexual intercourse.

1. HUMAN
REPRODUCTION
Life sciences

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.

6. 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.

7. SPERM CELL

8. 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.

9. CROSS SECTION OF A FEMALE

10. 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. CROSS SECTION OF A MALE

12. 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.

13. 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.

14. EMBRYO

15. 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.

16. EMBRYO DEVELOPMENT

17. REPRODUCTION
Next
Definition
Reproductive cells
Primary sexual characteristics
Secondary sexual characteristics

18. DEFINITION
Human beings
reproduce
through sexual
reproduction,
bringing male
and female sex
together.
Return

19. PRIMARY SEXUAL
CHARACTERISTICS
We already have
them when we are
born and they are
different for male
a female. Return

20. SECONDARY SEXUAL
CHARACTERISTICS
This characters are
the external
characteristics
which differentiate
men from women an
appear during
puberty with some
physical changes.
Return

21. REPRODUCTIVE CELLS
Carry out the function of reproduction:
•Sperm •Ovary
Are the male
reproductive
cells
Are the female
reproductive
cells
Return

22. THE REPRODUCTIVE
SYSTEM
The female reproductive system
The male reproductive system
Fertilisation
Next

23. THE FEMALE
REPRODUCTIVE SYSTEM
Is made up of these organs:
Fallopian
tubes
uterus
ovary
vagina
vulva
Return

24. THE MALE REPRODUCTIVE
SYSTEM
Is made up of these organs:
seminal
vesicles
prostate
scrotum
testicle
urethra
penis
vas
deferens
Return

25. FERTILISATION
Occurs when an ovum
and sperm join and
they create a cell
called zygote.
It is implanted in the
wall of the uterus and
it become an embryo.Return

26. PREGNANCY AND BIRTH
Pregnancy, protective structures
Pregnancy, baby development
Birth, labour
Next

27. PREGNANCY, PROTECTIVE
STRUCTURES
During the pregnancy different structures
are create to protect the embryo.
Umbilical cordon: connects
the embryo to the placenta.
Placenta: takes
nutrients and oxygen.
Amniotic sac: protects
the embryo.
Return

28. PREGNANCY, BABY
DEVELOPMENT
• After 3 months: the embrion has all its
organs. It becomes an foetus
• After 5 months: the foetus starts moving
• After 9 months: is ready to be born Return

29. PARTS OF THE LABOUR
Dilation: the contractions
make the opening of the
vagina and vulva big enough
for the baby to come out.
Expulsion: the baby is born.
Afterbirth: the placenta
comes out of the mother’s
body.
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2
Return

30. ALVARO M.
HELENA
ALEX
MARCOS
FIN

31. REFERENCES
 This presentation is a mash up from different sources. They
are
 Sacha herrero Giraldo 6-A
 http://www.slideshare.net/Crelgo/human-reproduction-sacha
 http://www.slideshare.net/Bonaval81/human-reproduction-
28781095?qid=041ee5bd-e3fb-4a10-92ab-
db9e663552f9&v=default&b=&from_search=4