Name given to bacteria that do not require oxygen, but neither are they killed in
its presence.

Anaerobes

I hope this helps, I'm currently learning the same thing.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.