Growth and Development

Growth and Development

Growth

• Soon after the fertilization, the zygote begins to divide

• The single cell divides to form two cells, then four and so on

• embryo --> foetus --> baby , the cell division contibues

• Each cell grows --> then divides, then grow then divides over and over again

• This carries on all through childhood, until a person has reached adulthood and stop growing

Multiple Choice

after the fertilization, the zygote begins to ...

• Divide

• broken

Multiple Choice

Correct statement

• Zygote ---> foetus --> embryo --> baby

• zygote --> embryo --> foetus --> baby

• Zygote --> foetus --> embryo --> baby

Development

• The change from a zygote to an adult does not only involve only growth. it also involve development

• As the tiny embryo develops, its organs gradually form. For example, it develops a heart, lungs , and a brain

• When baby is born, it has all of its organs. But development continues. Its muscle become stronger as it learns to crawl, walk, and run

Development

• Its brain develops, as it learns to talk and play with toys

• Each person is an individual. Each of us develops in slightly different ways and different pace.

Open Ended

You have million cells in your body. Where did they all come from ?

Adolescence

• At around 12-13 in boys and 10 or 11 in girls, a big step in development takes place

• The reproductive organs and the brain undergo quite large changes. There is often a growth spurt ( a sudden, rapid period of growth)

• This time of change from childhood to adulthood is called adolescence

Adolescence - Change in reproductive organ

• Girl : menstruation begins

• Hormone produced by the reproductive organs cause change in body shape, as breasts develop and hips widen

• Hair begins to grow in the armpits and other parts of the body

Adolescence - Change in Reproductive Organs

• sperm production begins

• Hormones produced by the reproductive organs cause body shape changes , as shoulders broaden

• The voice becomes deeper

• Hair begins to grow on the face, armpits and the other parts of the body

Multiple Choice

There are Changes in female during adolescence, except

• menstruation

• sperm production

• Breasts development

Multiple Select

The changes in male during adolescence (choose 2)

• hips widen

• menstruation

• sperm production

• voice becomes deeper

Adolescence - changes in the brain

• The brain does not grow any larger during adolescence

• But, there is quite a lot of reorganisation in the brain, which makes person think and feel differently from when they were a child

• changes :

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• The person becomes better at making decisions and planning ahead

• Emotions may become stronger. People may worry more. They may begin to have romantic feelings, self aware

• There is often a strong need for approval by friends and other

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