Human Reproduction (part 3)

Unit 4, 5th level

by Daniel Juan Santigosa

table of contents

Childhood

Puberty

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From childhood to old age

After human beings are born, they grow and develop in different stages. These stages are childhood, puberty and adulthood

Childhood

Girls and boys are considered babies until they are one year old. During this stage, they grow very quickly. They learn how to eat, walk and make sounds, and their first milk teeth appear. Children continue to grow after the first year, but at a slower rate. Their bones and muscles get stronger, and at the age of six their adult teeth start to appear. They start to look after themselves, relate to other people, and learn to speak fluently. They also learn about the world around them

Puberty

Puberty is the stage of human development when girls start to change into women, and boys into men. Girls normally go through this stage from the age of 11 to 16, and boys from 13 to 18. This is the stage when their reproductive systems start to mature; boys produce sperm and girls release ova. The physical appearance of boys and girls also changes:

- In boys, their chest and back get wider, they grow hair on their faces, pubic region and armpits and their voices become deeper. - In girls, their breasts develop, they grow hair on their pubic region and armpits, and their hips widen.

Adulthood and old age

Humans reach adulthood when their bodies have fully developed. During this stage, humans often find a partner and have children. After many years, the human body begins to function less efficiently and the bones grow weaker. This is the final stage of life, called old age. Moder medical care makes it possible to treat many of the illnesses associated with old age. This means that people at this stage in their lives are able to live longer and enjoy a better quality of life.

It is important to help elderly people look after themselves. With our help and understanding, they can avoid some of the problems that come with old age

end of

human reproduction

part 3