Description: the face of human or other mammals is covered with the protruding part in front of the nasal cavity; Generally refers to the nose including the nasal cavity.

Concept: Nasal cavity is divided into left and right cavities by nasal septum, with nostril communicating with the outside world in front and nasopharynx in the back. In front of the nasal cavity is the nasal vestibule, which is covered with skin and has nasal hair, which plays a filtering role and is prone to boils.

The posterior part is the proper nasal cavity, lined with mucosa, which can be divided into olfactory part and respiratory part. Has the functions of smelling fragrance, moistening and purifying inhaled air. Sinus is located in the skull around the nasal cavity, which is a cavity containing gas and communicating with the nasal cavity, and its mucosa is connected with the nasal mucosa. When the nasal cavity is inflamed, it can spread to the sinuses and cause sinusitis. The paranasal sinuses are involved in moistening and heating the inhaled air, and play a role in pronunciation.

example sentence

1, crying when encountering such difficulties, feelings are too fragile.

2. The nose can feel the smell and the ears can feel the sound.

3. The elephant's nose is made up of tough muscles, which can expand and contract at will.

The dog approached the steak with its nose and smelled it carefully.

The enemy was led by the nose by the Red Army, and even the shadow of Lian Hongjun was not found.