What are three cell structures that all cells have?

All cells have a plasma membrane, ribosomes, cytoplasm

Explanation:

All cells have plasma membrane, ribosomes, cytoplasm, also DNA.

Prokaryotic cells don't really lack nucleus and membrane-bound forms.

Eukaryotic cells have a nucleus and membrane-bound structures, which is called organelles.

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.