Ok my teacher, gave me some homework. I turned it in but he keeps saying its wrong. He is not telling me why.

The question is

Explain how bacteria infect the body and what can be doen about bacteral infections.

This is what i have so far: (This is not done)

How do bacteria infect the body?, Well first you will want to know what a bacteria is. Bacteria are organisms made up of just one cell. Bacteria have the power to divide, so they can multiply. The bacteria come in many shapes and sizes. Also bacteria exist everywhere, inside and on our bodies. Most of them are harmless, but some of them are harmful.
Now how do bacteria enter the body? Well, first Bacteria must get in. Bacteria enter the body by contact with the mucus membrane or breaks in the skin, such as cuts or other traumas.

Any suggestions are welcome
Thanks,
Christian