*growth and development

• Growth


  every1 on Earth began as a single cell, which got divided to produce two cells.

  each of them got bigger, then divided again.
• Embryo


  all cells start off as the same and produce a little ball of cells called an embryo, and eventually a baby.

  
  

  the rate at which this happens varies depending on the type of tissue or organ involved.

  
  

  this all happens inside a mother's body.
• by the time a baby's born, it is a miniature human being and continues to grow until it is about 18-20 years old.
• Development

  the changes from a single cell to a adult human involves more than just growth.

  
  

  as the tiny embryo grows into a baby, all its different tissues and organs are formed.

  as the baby grows into a child, its leg muscles and bones become stronger, so it can walk and the run.

  its brain develops, as it learns to talk and play with toys.
• each person is an individual, and everyone grows and develops at different rates, in slightly different ways but everyone goes through the same stages in development.

  each stage blends gradually into the next as there are no sharp divisions between them.

  
• Cell Division


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