- The life of a baby begins inside the mother.
- The sperm from the father unites with one of her eggs.
- Form a new cell.
- Unites process is called fertilization.
- New cell moves to the Fallopian tube to the uterus and embedded.
- Two hours after fertilization – will divide into two cells
- 20 hours later – two cells divide producing four cells
In The Beginning of Creation
Ins and Outs - Cells
- In an adult human's body – contains billions of cells.
- Egg Cells – beginning of the baby – is a largest cells – 0.2mm, is about size of the dot of "i".
- Brain Cells – is a smallest cell – 0.005 mm.
- A Cells is surrounded by cell wall – allows substances to move in and out the cell.
- A Cells – filled with jelly-like substance - cytoplasm – contains everything the cell needs to stay alive
- At centre of the cells
– nucleus – provides all the instructions the cell needs to do it task properly. - The detailed instructions – contained in complicated string of chemical – chromosomes.
- Except egg cells and sperm cells – all cells contain 46 chromosomes.
- Egg and sperm cells – contain 26 chromosomes.
- Chromosomes – made of a complicated chemical called deoxyribonucleic acid (DNA).
- DNA – like spiral ladder – made of small unit called genes.
- Genes –
carry the genetic information that determines exactly what we look like.
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