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Lung anatomy

The key regions: RIBS: (and heart position); LUNGS: position within ribs and around heart (note left lung different to right); DIAPHRAGM: immediately beneath lungs with edges attached to lowest ribs; PLEURA: surrounds the lungs in protective function; RIB MUSCLES: between each rib to aid breathing; BRONCHI: and respiratory tract; ALVEOLI: where diffusion occurs;