In order of occurrence, list the joint actions and the joints where they would occur as you (a) sit down at a table, (b) reach our and pick up and apple, (c) take a bite, (d) chew it. Assume that you start in anatomical position.

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.

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