Why are there so many different kinds of allergies?"

where is the diagram?

if you insert the diagram ill be able to you

b - the respond is innate and varies over time.

good luck!

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.