The left ventricle of the heart . receives oxygen-poor blood from the lungs
pumps oxygen-rich blood to the body
receives oxygen-rich blood from the rest of the body
pumps oxygen-poor blood to the lungs

pumps oxygen-ruch blood to the body

oak trees? ? what was listed

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.