What is the human’s respiratory system consist of?
The respiratory system is made up of a series of organs that facilities the route of oxygen present in the air entering into the body, it is also responsible for providing the route of excretion of carbon dioxide, this process is known as respiration. At the point when the air is breathed in, it travels through the air passages to reach the lungs, it is warmed or cooled to body temperature, and moisture is added. The air is then filtered so that particles of dust or bacteria stick to the mucus which coats the lining membrane which is found throughout the respiratory tract.
Air enters the body through the upper respiratory tract, through the nasal cavity to the pharynx. It proceeds the journey down into the lower respiratory tract, passing from the top of the trachea before being transferred into two main branch-like airways, knowns as primary bronchi. Each primary bronchus enters the lungs at a site called the hilum; this is where the main blood vessels pass in and out of the lungs. After the primary bronchus enters the lung on each side, its divided into secondary and tertiary branches called bronchioles which transfer air to the lobules. At the end of the bronchioles air then enters the alveoli, this where the lungs correspond with the blood vessels and gas exchange happens.