Breathing or also known as respiration can be defined as a process of taking in oxygen and releasing carbohydrates and using energy in the body. When humans breathe, it means that there is a process of entering oxygen into the body and releasing carbon dioxide out of the body. The exchange between oxygen and carbon dioxide occurs in the human blood. Humans who have normal breathing are characterized by breathing 12-20 times a minute.

a. Nose

Air coming from outside will enter the nasal cavity. Inside the webbed nasal cavity, there are oil glands and also sweat glands. The membrane serves to capture foreign objects that enter the respiratory tract.

In the nasal cavity, there are also small and thick hairs. The hairs have the function to filter dirt particles that enter the nose with the air. In addition, there is also a concha that has the function to warm the cold air that enters the nasal cavity.

b. Mouth

There are certain times when humans cannot use their noses to breathe air or oxygen, one example is when they have the flu.

As we know, when the body has a cold, it will release a mucus liquid called snot in large quantities.

The amount of snot mucus that comes out sometimes makes the nose become clogged. This condition certainly makes it difficult for us to breathe and inhale oxygen through the nose.

Therefore, the mouth becomes the main helper that can replace the role of the nose. Breathing through the mouth is called short breathing because it does not go through the filtering stage, as well as temperature regulation first, so the air goes directly into the lungs.

However, the breathing process has the advantage that the incoming air amounts to more and can also directly enter the lungs faster than the process of breathing through the nose.

c.Lungs

The lungs are in the upper chest cavity. Next to the lungs are the ribs and below them is the diaphragm. The lungs are divided into two parts, the right and left. The right lung consists of three lobes, while the left lung has two lobes only. The lungs are covered by a thin membrane.

Inside the lungs are branches of bronchi, alveolus, and blood vessels. The bronchioles have further branches called respiratory bronchioles. The lungs are where oxygen and carbon dioxide are exchanged.

d.bronchi

The bronchi are one of the constituent organs of the human respiratory system which consists of two parts, namely the right and left bronchi. The function of the bronchi is to help moisturize the air that has been inhaled by humans. Therefore, in its application, the bronchi work by carrying air to the lung organ. That way, the air can be filtered perfectly through the respiratory tract.

e.branching tubes

The trachea divides into 2 bronchi in your lungs. These are called the left and right bronchi. The bronchi continue to branch into smaller and smaller tubes, the bronchi.

f.air sacs

The smallest branch of the tube is known as the bronchiole which has an air sac at the end. The air sac is called the alveolus. The function of the alveolus is to exchange oxygen and carbon dioxide in the respiratory system.

g.trachea

As one of the body's organs in the field of breathing, the functions of the trachea in humans are very diverse. The first function of the trachea is to provide respiratory access to the body. The trachea supplies air to the lungs so that air can enter and exit the lungs.

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