During the bronze age, the leaders of two emerging kingdoms stood out. akhenaton of is known for promoting monotheistic religion in his kingdom, while sargon the great of is remembered for his ability to build a vast empire from military success.

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.