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Parts of the Nose

External nose: This is the part of the nose that you can see. It includes the bridge, tip, alae, nares, and columella. Internal nose: This is the part of the nose that you can't see. It includes the nasal septum, nasal turbinates, nasal concha, sinuses, vomeronasal organ, and olfactory epithelium. The nose has three main functions: Respiration: The nose warms, moistens, and filters the air that we breathe in. Olfaction: The nose allows us to smell. Thermoregulation: The nose helps to regulate body temperature.