Human reproduction involves the joining of male and female sex cells through sexual reproduction. The primary sexual characteristics are the reproductive systems which differ between males and females and are present at birth. Fertilization occurs when an ovum and sperm join inside the fallopian tubes to create a single cell called a zygote, which implants in the uterus wall and becomes an embryo, leading to pregnancy and culminating in labor and birth.

1. Human reproduction
By Alberto Fernández and Diego Barrios

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 alredy have them when we are born
and they are different for male and female.

4. Reproductive cells
Sperm Ova

5. Female reproductive system

6. Male reproductive system

7. Fertilisation
•Fersilitation 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.

8. Pregnancy and birth

9. Labour
 Dilation: rhytmic contractions make the
openning of the vagina and the vulva big
enough to the baby comes out.
 Expulsion: the baby is born and the doctor
cuts the umbilical cord.
 Afterbirth: the placenta comes out of the
mother`s body.

10. The end