Short Essay About Respiratory System

The human respiratory system is adapted to allow air to pass in and out of the body and also for efficient gas exchange to occur. The respiratory system includes air passages, pulmonary vessels, the lungs, and breathing muscles. Most of the organs of the respiratory system help to distribute air, but only the tiny alveoli and the alveolar ducts are responsible for the gas exchange.

Mouth - The mouth is the secondary exterior opening for the respiratory system. Most commonly, the majority of respiration is achieved through your nose and nasal cavity, but the mouth can be used if needed. Inhaling air through the mouth allows more inhalation, as the oral cavity is far larger than the nasal cavity.
Nasal Cavity - The nasal cavity is a hollow
The left bronchi is narrower, longer and more horizontal than the right. Irregular rings of cartilage surround the bronchi, whose walls also consist of smooth muscle. Once inside the lung the bronchi split several ways, forming tertiary bronchi.
Bronchioles - The main function of the bronchioles is to carry air from the trachea into the lungs. When someone takes a breath through their nose or mouth, the air travels into the larynx. The next step is through the trachea, which carries the air to the left and right bronchus. The bronchi become smaller the closer they get to the lung tissue and are then considered bronchioles.
Alveoli - Alveoli are tiny sacs within our lungs that allow oxygen and carbon dioxide to move between the lungs and the bloodstream. They are surrounded by a network of capillaries, into which the inspired gases pass. There are approximately 3 million alveoli within an average adult lung.
Capillary network - It is through the capillaries that oxygen, nutrients, and wastes are exchanged between the blood and the tissues. The capillary networks are the ultimate destination of arterial blood from the heart and are the starting point for flow of venous blood back to the heart.