What act as decomposers and consume dead organisms.

fungi and detritivores,

Explanation:

fungi along with invertebrate organisms sometimes called detritivores, which include earthworms, termites, and millipedes. ... While decomposers break down dead, organic materials, detritivores—like millipedes, earthworms, and termites—eat dead organisms and wastes.

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.