God Almighty distinguished man from the rest of the creatures with the mind to think about him, but this mind is not enough alone without the means to make him communicate and feel the world around him, it is God yes we make us five senses to feel everything that is happening around us, And taste things in his tongue, and touch things through the sense of touch, as smells smells through his nose.
The nose is very important for the human being. In addition to sensing the smells in the surrounding environment, it is an important part of the respiratory system because it is the outlet for entering oxygen into the body. The nose is a member of the smell. It contains the olfactory epithelium inside it. It is also a very important part of the respiratory system, Oxygen to the lungs, and the nose is located in the middle of the face above the palate and the steel between the cheeks, and the nose is divided into two parts:
- An external section called the virtual nose.
- A deep section called the nose cavity.
The nasal breathing is better than breathing through the other outlet, the mouth, because the nose cleans and purifies the air entering the lungs. The nose also moisturizes the air. It also contains nerve endings and ends. The veins and arteries that warm the air before entering the lungs, and the nose can deliver odors to the brain to know and distinguish them through the nerve located at the end of the nose.
Even if the nose can do its fullest, it must contain means to clean the air into the lungs, because the air around us is full of pollutants and dust. If these pollutants and dust enter the lungs, they will cause a lot of problems in the respiratory system. Nose to keep the air cleaner into the lungs ?.
The nose contains a mucus-producing tissue called the mucous tissue. This tissue is characterized by a variety of nasal cavities. The nasal region of the nose is dry and easy to peel, with long cilia with the task of preventing large particles and dirt entering the nose with air. The upper area contains cilia Dense with the presence of cells specific to the sniff.
As for the lower region, it contains some of the cells of the cell, as well as a lot of cells that secrete a substance mucous gel, and the function of this mucous material form a layer that absorbs the gases and small particles that are under it, and then work the cilia move this layer saturated with dirt and toxic gases and put Towards the mouth, it is worth mentioning that when inhaled toxic gases may damage the mucous cells, which leads to destruction, but these cells the ability to renew within hours.
From all the above we conclude that the means of defense available in the nose are:
- Mucous tissue.
- Capillaries.
- Cilia.