Structure of nose

The nose consists of three parts: external nose, nasal cavity and sinus.

(1) The external nose consists of nasal bone, nasal cartilage and soft tissue. The external nose protrudes from the face and is vulnerable to trauma. The soft tissues of the tip and alar are tightly attached to the skin, which will be very painful if it is inflamed, and it is also a good place for acne and rosacea. If the external nasal venous blood meets the cavernous sinus, if the inflammation is not handled properly, it can cause complications such as phlebitis in cavernous sinus blood test.

Structure of nose

1, nasal root 2, nasal bridge 3, nasal tip

4. Anterior nostril 5. Nose backward

6, nasolabial groove 7, alar

(2) The front part of the nasal cavity is called the nasal vestibule, which has nasal hair and abundant sweat glands and sebaceous glands, and is prone to furuncle. The top of nasal cavity is a part of the bottom of anterior cranial fossa, which is thin and closely connected with dura mater, through which olfactory nerve passes. Inside the nose is the nasal septum, and there is a rich vascular network in front. The surface of the lateral wall of the nasal cavity is irregular, and there are three vertical downward protrusions, which are called upper turbinate, middle turbinate and lower turbinate respectively. The space below each turbinate is called nasal meatus, that is, upper, middle and lower nasal meatus. The gap between the middle turbinate and the nasal septum is called the common nasal meatus. The lower nasal passage has an opening of nasolacrimal duct, the middle nasal passage has an opening of frontal sinus, anterior ethmoid sinus and maxillary sinus, and the upper nasal passage has an opening of posterior ethmoid sinus and sphenoid sinus.

4- Middle meatus 5- Middle turbinate 6- Inferior turbinate

7- inferior nasal meatus 8- nasal vestibule 9- sphenoid sinus

10- eustachian tube protrusion 1 1- eustachian tube pharynx

(3) There are four pairs of paranasal sinuses, namely frontal sinus, ethmoidal sinus, maxillary sinus and sphenoid sinus.

① Frontal sinus: located in the lower part of frontal bone, the posterior wall is a thin bone plate separated from the anterior cranial fossa, and the bottom wall is equivalent to the upper angle of the orbit, which is very thin. In acute frontal sinusitis, there is obvious tenderness here.

② ethmoid sinus: located in ethmoid bone between the orbit and the external upper part of nasal cavity, it consists of a very thin small bone plate, which is divided into two groups. The outer and inner sides of the orbit are paper templates as thin as paper, so ethmoid sinus or orbital inflammation can infect each other.

③ Maxillary sinus: It lives in the maxilla and is the largest pair of sinuses, with an average volume of about 13 ml. The opening position of maxillary sinus is high, which is not conducive to drainage, so it is more inflamed than other sinuses.

④ Sphenoid sinus: located in the sphenoid bone above the nasal cavity, its top, outer wall and posterior wall are separated from the middle cranial fossa and the posterior cranial fossa by bone plates, which are closely related to the orbital apex, so sphenoid sinusitis can cause optic neuropathy.

What is snot made of?

The dust in the air enters the trachea, and the hair in the trachea cleans and precipitates bacteria, and then forms a viscous liquid, which forms a snot through the nose.

What are the bones of the nose made of?

On both sides of the bridge of the nose is nasal cartilage. I often hear that so-and-so has a broken nose. It's broken nasal cartilage. Improper management can lead to nasal collapse ~ ~ ~

What muscles does the human nose consist of?

The skin of the nose is one of the most important factors to be evaluated before cosmetic surgery. Generally speaking, the nose skin of orientals is thicker than that of westerners, and the subcutaneous tissue is richer. Thick skin is more prone to postoperative edema and scar formation than thin skin, and the skin recovery is slower after operation. But thick skin is more difficult than thin skin to distinguish the tiny irregularities and asymmetry left after operation. The soft tissue of the bridge of the nose is thickest at the root of the nose and thinnest at the bone of the nose, so this must be taken into account when removing the nose bulge and correcting the aquiline nose. There are four layers between skin and bone and cartilage: thin fat layer, fibromuscular layer, periosteum and perichondrium. Among these four layers, there is a fascia layer, which includes the fibromuscular layer and divides the subcutaneous fat layer into two parts. This layer forms a continuous fascia layer around the whole face, which is connected with facial muscles, frontalis muscles and platysma muscles. The main blood vessels and nerves distributed in the external nose pass through the fascia layer and the fat layer. Therefore, the deep fat layer and perichondrium below the fascia layer are the most ideal nasal plastic surgery surfaces. On this operating surface, it is easy to separate the flap, which can reduce the damage to blood vessels and nerve tissue, have a good surgical field of vision and prevent the deformation caused by postoperative scar contraction.

The nose consists of three parts: the external nose, the nasal cavity and what?

Accessory sinuses

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How can I hit Metal Roar 2?

The Paris Commune was the first socialist commune, which triggered the first socialist country in the Soviet Union and made great contributions to mankind in history. There is a Kibbutz commune in Israel, which can be said to be the first producer commune in the world. Just look it up online. Kibbutz Commune let people know what is the real concrete model of capitalism, which is of great and far-reaching significance.

The nose consists of three parts: the external nose, the nasal cavity and what?

Sinus canal . . . .

What is booger made of?

Mucin, water, sodium chloride, cell debris, dust and possible virus particles or bacteria.

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