What is the lower respiratory system?

The lower respiratory system is the lower half of the airway. Includes a trachea or trachea; Bronchi, two branches of the trachea that penetrate the lungs; the lungs themselves; and bronchiola and alveoli in the lungs, where gas is replaced. In the lower respiratory system, the air that has been filtered from pathogens and heated in the upper airways, transported to the lungs. There the oxygen will be pulled out of the inhaled air and placed in the bloodstream, while the carbon dioxide from the bloodstream is released back into the lungs so that it is exhaled from the body. This gas exchange is the primary function of the respiratory system. It moves from the nasal passages or mouth to the neck, also known as the pharynx and finally to the voicemail, also known as the larynx. At the top of the larynx is an important tissue called epiglottis, which opens during inhalation to allow inhalation air to pass into the trachea and closes during swallowing, covers the larynx opening so that food and drink can not enter the airways. For HRTAnem enters air into the trachea, the beginning of the lower respiratory system.

Trachea is a tube about a thumb across, a few inches in length and is made of stacked cartilage semicrules, similar to the arrangement of vertebrae in the spine. It performs two functions: it moves the air down from the larynx to the paired bronchi, contributes to filtering and warming air as it does, and moves mucus and other materials from the lungs, as in cough. As such, it is partially covered by a muscle called trachealis, which lends the interior of the trache of elasticity and allows the objects to push up during the cough.

At the lower end of the trachea is a division into two airways of the lower respiratory system, bronchi. Each bronchus, which spread down and out from the base of the trachea, penetrates one of the lungs, carrying air that was not only filtered and brought to body temperature, but moistened to one of the organ. For distributionThis air in the lungs is subsequently divided into several smaller airways; The first divisions are known as secondary or Lobar Bronchi and their subdivision are tertiary or segmental bronchi.

Like the heart, the lungs are made up of several chambers known as lobes: two in the left and three in the right lungs. So Lobar Bronchi is those that carry the air on each lobe inside which are located a smaller segmental bronchi. The segmental bronchi leads to another branch of the lower respiratory system, bronchioles. These small airways bring inhaled air to alveolar bags, tin bouches throughout the respiratory or final bronchioles, which are in places of gas exchange.

inside the alveolar bags are alveoli, final units of the lower respiratory system. These fill the walls of alveolar bags and are a place where oxygen and carbon dioxide are exchanged during breathing. This is because alveolar walls are also dense on their outside with capillaries that receiveOxygen from air to the bloodstream and then release carbon dioxide from the bloodstream to the lungs.