SCIENCE

by: Miriam de Pedro

Male reproductive system

It is made up of different organs:• Testicles They are outside a male ´s body.• Vas deferens They are two thin tubes that take the sperm from the testicles to the urethra.• Urethra It is the tube that takes urine or sperm outside the body.• Seminal vesicles and prostate They are glangs that produce seminal fluid. • Penis It is outside the the male reproductive system.

Fertilisation

Fertilisation occurs when a sperm joins the ovule in one of the Fallopian tubes. At this moment, the zygote is now called an embryo.

This is called a woman´s menstruation or period.

Pregnancy and birth

Pregnancy lasts about nine months and ends in a birth.

The placenta It is a spongy organ that connects the wall of the uterus.

The unbilicar coord. It is made up of blood vessels and connects the embryo to the placenta.

The amniotic sac It is a membrane filled with fluid that protetects the embryo.

Childbirth

Labour Rhythmic contractions dilatethe uterus, making the opening of the vagina and vulva. Birth This is when the baby leaves the womb

thorough the vagina, which also dilates.

Afterbirth Afterwards, the placenta is expelled from the mother´s womb.