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The human nose is the first organ of the respiratory system. It is also the principal organ in the olfactory system . The shape of the nose is determined by the nasal bones and the nasal cartilages , including the nasal septum , which separates the nostrils and divides the nasal cavity into two.
A nose is a protuberance in vertebrates that houses the nostrils, or nares, which receive and expel air for respiration alongside the mouth. Behind the nose are the olfactory mucosa and the sinuses. Behind the nasal cavity, air next passes through the pharynx, shared with the digestive system, and then into the rest of the respiratory system.
This diagram linearly (unless otherwise mentioned) tracks the projections of all known structures that allow for olfaction to their relevant endpoints in the human brain. Peripheral [ edit ] The peripheral olfactory system consists mainly of the nostrils , ethmoid bone , nasal cavity , and the olfactory epithelium (layers of thin tissue covered ...
Nasal cavity anatomy. The term "nasal cavity" can refer to each of the two cavities of the nose, or to the two sides combined. CT scan in the coronal plane, showing the ostiomeatal complex (green area) The lateral wall of each nasal cavity mainly consists of the maxilla.
This article describes the anatomy of the head and neck of the human body, including the brain, bones, muscles, blood vessels, nerves, glands, nose, mouth, teeth, tongue, and throat.
In humans and other mammals, the anatomy of a typical respiratory system is the respiratory tract. The tract is divided into an upper and a lower respiratory tract. The upper tract includes the nose, nasal cavities, sinuses, pharynx and the part of the larynx above the vocal folds.