Who is the ceo of apple

Tim cook is the ceo of apple.

Tim Cook used to be Steve Jobs

Explanation:

(If you mean the tech company Apple)

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.