SCIENCE

Paula Crespo González

HUMAN

REPRODUCTION

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

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.

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.

Reproductive cells

- Ovules : They are femaleReproductive cells . They are big

and round .- Sperm: they are male

reproductive cells.They are small.

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

Female reproductive system

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

Male reproductive system

Fertilisation

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

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.

The development of an embryo

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By Paula Crepo