writing a paragraph about our organs

Write an explanatory paragraph about the organ you have researched WALT: we learn how to write a paragraph using the text format. The brain controls your body it helps you think` especially when you need help with your maths it even stores memories.
 For if you didn't have a brain you would have short-term memory last for the rest of your life and you're probably be dumb and you would know how to talk.
 And if this something that you can't do don’t do it, especially if it's something dangerous you could badly hurt yourself but if you try it, make sure you wear a helmet.
Just in case You hurt  your head. 
T:  topic sentence
E:  example

X: Explain further
T:tie up