1. SCIENCE
Paula Crespo
González
HUMAN
REPRODUCTION

2. 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

3. 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.

4. 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.

5. Reproductive cells
- Ovules : They are female
Reproductive cells . They are big and
round .
- Sperm: they are male reproductive
cells.They are small.

6. 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

7. Female reproductive system

8. 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

9. Male reproductive system

10. Fertilisation
 Fertilisatin is the union of sperm
and ovule in one of the Fallopian
tubes. Menstruation occurs if the
ovule is not fertilised

11. 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.

12. The development of an embryo

13. E N D
 By Paula Crepo