Nose

The nose is the olfactory organ, which allows humans to feel and distinguish smell. Formed by the nasal cavity (cavum nasi). Besides sensory function it works also for heating and humidifying the air prior to entry into the respiratory tract and as a primary barrier against infection.

Construction of the nasal cavity

The nasal cavity is divided into three passages turbinate – upper, middle and lower. Back follows the nasopharynx, through holes, so called Choan. Unevenly it is also divided into two halves, whose outputs are nostrils. When entering them skin covered with hairs, which serves as protection from harmful external influences. At the olfactory mucosa can find field (regio olfactoria). This yellowish site allows us to perceive odors.

Diseases of the nose

The most common internal diseases of the nose is rhinitis (runny nose), which is also one of the most common diseases in general. From the outside, the nose may be vulnerable to skin cancer, particularly basal cell carcinoma. It is one of the common forms of cancer. Arises from excessive sun exposure and mainly affects old people. This type of cancer is, however, easily treatable, and especially in most cases not metastasize.