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Glossary
Puberty
The start of the time when you change from a child into an adult.
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Human Body - Glossary
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Cerebral cortex
The largest part of your brain. It is divided into two halves, called ...
Fertilization
The joining of a male sperm and a female egg to make a baby.
Mucus
A slimy substance which helps to protect the lining of your nose, ...
Vertebrae
The separate bones which make up your spine, or backbone.
