What happens in an Aeration tank at as Wastewater Treatment Plant?
Chlorine is added to the water for disinfection
Oxygen is provided to Bacteria so they can break
down waste
Large items are removed from Wastewater using a
large screen
Coffee grounds and eggshells are removed from the

littering streams           is the answer

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.

i think this picture will you.