An organ is a combination of different functioning together for a specific task.

hola no se cial es la respursta pero garcias por escucharme

Explanation:

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.

the tricuspid valve is present between right atrium and right ventricle