1. separates thoracic from abdominal cavity diaphragm 2. muscles between the ribs that contract and relax as the lungs expand intercostal muscles 3. allows optimal expansion and contraction of lungs, helps reduce friction, if damaged… no more breathing (ur fucked) i.e., lung “puncture” plural membrane 4. parts of integument of skin that wraps around outside of nose (not mucosal lining) that filter particles out of air nasal hair 5. if particularly large, results in more nasally sounding voice, if insanely large can reduce air flow, part of lymphatic system (basically glorified lymph node)à immune cells like to “hide out” in these structures, these structures act as primary source of fighting infection from debris and bacteria inhaled tonsils 6. protrusions into hollow passage of nasal cavity, separated by meati, increase surface area, causes turbulence ensuring air mixes with mucous produced nasal conchi 7. connects pharynx to inner ear, drains water from inner ear into pharynx, is more horizontally orientated in children, causing drainage to be less effective and increase likelihood of ear infections pharyngotympanic tube 8. humidifies the air, bringing it up to body temperature before it reaches the lungs and preventing the air from drying out your lungs mucosa 9. lined with horseshoe shaped rings trachea 10. allows you to swallow by staying relaxed, providing the system with enough flexibility to allow the bolus to pass through the esophagus trachealis muscle Word Bank Diaphragm Nasal conchae Mucosa (mucous membranes) Pharyngotympanic tube Intercostal muscles Trachealis muscle Nose hairs Trachea Plural membrane Tonsil