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❶Next, the trachea is the organ that closes when you are swallowing but opens to let air into your lungs, bronchi is the organ that leads the air from your trachea into to two paths into two different lungs that look like branches and the branches get smaller into the bronchioles. The human lungs have been designed to maximise the exchange of gases as follows:.

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Next, the trachea is the organ that closes when you are swallowing but opens to let air into your lungs, bronchi is the organ that leads the air from your trachea into to two paths into two different lungs that look like branches and the branches get smaller into the bronchioles.

The trachea windpipe is reinforced with cartilage rings which are flexible and are strong and are made up of specialized cells. Then, the bronchioles split the air again to ensure equal amount of air into the small little buds at the end called alveoli.

Carbon Dioxide leaves the same way from the blood on the way back. Now, the way this is possible is by the alveoli are wrapped around by capillaries which are small pipes that carry blood around the body to deliver oxygen to your organs, muscles and tissues. And, the exchange happens by the following diagram. As you can see the Carbon Dioxide leaves first and then the blood cells get the oxygen cells right after to be delivered around the body.

The muscles are located at your rib cage and your diaphragm which is a big sheet of muscle you expand and contract to inhale and exhale air. When your diaphragm relaxes, air comes in your lungs but, when your diaphragm expands it exhales air from your lungs. The third point of this selection is the things that can affect your lungs in a bad way like diseases and cancer.

The diseases would be Tuberculosis TB is one of them, it gets in when you breathe and the symptoms are fever, cough, tiredness, weight loss, and chest pain. The upper end of trachea has a voice box called larynx. The trachea runs down the neck and divides into two smaller tubes called 'bronchi' at its lower end.

The singular of bronchi is bronchus. The two bronchi are connected to the two lungs. The lungs lie in the chest cavity or thoracic cavity which is separated from abdominal cavity by a muscular partition called diaphragm. The lungs are covered by two thin membranes called pleura.

The lungs are enclosed in a 'rib cage' made of bones called 'ribs'. We have not shown the rib cage in Figure 64 to keep the diagram simple. Each bronchus divides in the lungs to form a large number of still smaller tubes called 'bronchioles'. The smallest bronchioles have tiny air-sacs at their ends see Figure The pouch-like air-sacs at the ends of the smallest bronchioles are called 'alveoli' singular alveolus. The walls of alveoli are very thin and they are surrounded by very thin blood capillaries.

It is in the alveoli that oxygen is taken into the body and carbon dioxide is eliminated. In other words, it is in the alveoli that gaseous exchange takes place. The human lungs have been designed to maximise the exchange of gases as follows:.

There are millions of alveoli in the lungs. The presence of millions of alveoli in the lungs provides a very large area for the exchange of gases. And the availability of large surface area maximises the exchange of gases.

For example, if all alveoli from the two human lungs are unfolded, they would give an area of about 80 square metres which is nearly the size of a tennis court!

The diaphragm is a sheet of muscle below the lungs. It helps in 'breathing in' and 'breathing out'. The muscles of chest also help in breathing in and breathing out. When we breathe in air, the diaphragm arid muscles attached to the ribs contract due to which our chest cavity expands. This expansion movement of the chest increases the volume inside the chest cavity.

Due to increase in volume, the air pressure decreases inside the chest cavity and air from outside being at higher pressure rushes into the lungs through the nostrils, trachea and bronchi. In this way, during the process of 'breathing in' the air sacs or alveoli of the lungs get filled with air containing oxygen. The alveoli are surrounded by very thin blood vessels called capillaries carrying blood in them. So, the oxygen of air diffuses out from the alveoli walls into the blood.

The oxygen is carried by blood to all the parts of the body This oxygen is carried by a red pigment called hemoglobin present in blood.


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- The respiratory system is a complex organ structure of the human body anatomy, and the primary purpose of this system is to supply the blood with oxygen in order for the blood vessels to carry the precious gaseous element .

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The Respiratory System essays The human respiratory system is a complex system involving the coordination of organs with different structural, functional and defensive mechanisms. The high costs and the high fatality rates associated with chronic respiratory disorders require some serious rethinking.

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Respiratory System – Essay Sample Respiratory system plays a major role of transporting oxygen to the circulatory system which in turn transports it to all cells of the body. Oxygen is very vital substance that helps cells get energy for cellular activities. Essay: The respiratory system The human body is organized into numerous complex systems that interact with each other in order for it to function and sustain life. One of those vital systems is the respiratory system.

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The respiratory system (likewise referred to as the ventilator system) is a complicated biological system comprised of several organs that facilitate the inhalation and exhalation of oxygen and carbon dioxide in living organisms (or, in other words, breathing). The Respiratory System Essay Words 7 Pages The respiratory system is a complex organ structure of the human body anatomy, and the primary purpose of this system is to supply the blood with oxygen in order for the blood vessels to carry the precious gaseous element to all parts of the body to accomplish cell respiration.