Respiratory System


The respiratory system OR commonly known as ventilator system is the biological system that pioneer respiratory gases to the heart and execute gas exchange. In humans and other mammals, the anatomical skin texture of the respiratory system embrace airways, lungs, and the respiratory muscles. Molecules of oxygen and carbon dioxide are submissively replaced by neutralization amid the gaseous external environment and the blood. This replacement process transpires in the alveolar region of the lungs.

Other animals, such asinsects, have respiratory systems with uncomplicated anatomical characteristics, and in amphibians even the skin plays very important role in gas exchange. Plants also have respiratory systems but the methodology of gas exchange can be contradictory to that in animals. The respiratory system in plants also consists of anatomical features such as holes on the undersides of leaves commonly called as stomata.

Our cells cannot survive on carbon dioxide it needs to oxygen to stay in process and alive. Lungs are the most important organ of the respiratory system as it inhales oxygen from the air and exhales the carbon dioxide or unwanted waste.


We breathe in through nose which moistens the air. Any dust particles can be ensnared through the nose hairs. The dry air enters the lungs by the windpipe or commonly known as trachea. The trachea is an empty tube which is reinforced by rings of cartilage to thwart it from failing.


The lungs are within the chest, secluded by the ribcage and swathed in a membrane known as pleura. The lungs are contaminated with thousands of tubes that are why they look like big and giant sponges. The micro components of all are the air sacs known as alveoli. Each one has a fine lattice of capillaries. This is where the exchange process takes place i.e. interchange of oxygen and carbon dioxide.


Lungs totally depend on a space inside the chest to stay overstated. The diaphragm is a piece of muscle slung beneath the lungs. The diaphragm contracts and relaxes as soon as we breathe. This variation in air pressure means that air is first inhaled into the lungs and than exhalated by pushing it out of the lungs.

The intercostals muscles between the ribs help to change the internal pressure by elating and relaxing the ribcage in rhythm with the diaphragm.


The blood containing carbon dioxide comes into the capillaries lining the alveoli. The gas moves from the blood transversely into a thin film of moisture and into the air sac and then only breathing out of carbon dioxide takes place. At the time of inhalation, oxygen is strained down into the alveoli where it passes into the blood using the same film of dampness.


The respiratory system permits us to talk when the exhaled air runs over the vocal cords present inside the throat.

The vocal sound extremely depends on:

The shape of the chest.

Quantity in which air is exhaled.

The length of the vocal cords.

Disease Related to Respiratory System