1.- Translate the following words with the help of a dictionary:

• embryo
• embryonic
• cell
• mother cell
• stem cell
• adult stem cell
• embryonic stem cell
• disease
• tissue

2.- Find three diseases mentioned in the text.

3.- Use the Find/search in this page function to find these words in the text, and copy a couple of words before and after.

4.- Make a sentence with each of them.