Take a deep breath. Now blow it up slowly. The air that you have taken or inhaled while breathing is filled with oxygen, which your body needs to generate energy for cellular activities. The air blown or exhaled is filled with carbon dioxide, which is a waste in the human body and removed during exhalation.
Breathing is a method by which the human body exchanges oxygen from the environment with carbon dioxide in the body. This is an important function of the respiratory system, and the organs responsible for the exchange of these gases are the lungs.
Bronchi, especially known as bronchus, are an extension of the trachea that transports air into the lungs and from the lungs. Think of them as roads for gas exchange, with oxygen reaching the lungs and carbon dioxide leaving the lungs through them. They are part of the respiratory conduction zone. The conduction zone, which includes the trachea and throat, is the area of the respiratory system that only transports air into and out of the body and is not part of the gas exchange process.
Each bronchi function contains cartilage, mucosa and smooth muscles. Cartilage is a connective tissue that provides support for physical processes and in this case prevents bronchial collapse during inspiration and exhalation. This is important because air conduction involves pressure that can damage soft tissue if it did not protect. The lining of the mucous membrane produces mucus, which is a thick, semi-liquid substance, intended to capture foreign particles from the lungs.
Smooth muscles also occur in every bronchus. The muscles involuntarily controller, which means that you can not control it yourself. Your body determines whether this smooth muscle shrinks or relaxes depending on whether you need less or less airflow.
Imagine: you are walking in the woods and the bear is standing in front of you. The bear growls. In the moment of panic, you start to run away. After safely moving away from the bear, you realize that you are breathing hard and breathing.
In emergency situations such as those described above, breathing is necessary for survival. More oxygen reaches more of the energy produced by the cells that are necessary for the escape, including the muscles. In such cases, the body releases norepinephrine, an emergency hormone that causes relaxation of the smooth muscle in the bronchi function, which allows you to deliver more air to the lungs and deliver more oxygen to the necessary tissues. This applies to any exciting or emergency situation, regardless of whether it is about winning a lottery, playing sports or running away from a bear above.