Article Advise

submitted: Oct 29th 2008 | by: DonBethune | Total views: 1 | Word Count: 439 | |

Human being have lungs for respiration. So respiration in human beings is know as pulmonary respiration.Respiratory organs are well developed in human being.The respiratory system consists of repiratory tract and respiratory organs.The repiratory tract is passage along whcih air travels from the atmosphere in order to reach lungs.

The Nasal Cavity. The Nasal Cavity is situated above the mouth, and accesses the external atmosphere through the nostrils, and internally it accessed the pharynx with the internal nostrils. The nasal cavity helps filter out dust particles from the outside environment with the cilia and with mucus.

The Pharynx: The pharynx is the next stop for air after the nasal cavity. The glottis is the mechanism by which the pharynx opens into the larynx or voice box. The glottis also serves another important purpose. Because the digestive and respiratory tract both share the pharynx, the glottis is covered by the leaf like cartilage epiglottis when we swallow food, which prevents food getting into the respiratory system.

The Larynx: This is a cartilagious, box-like structure that is situated at the tracheal opening. The larynx will move up or down when we swallow to allow the passage of air or food, safely. It also is responsible for human speech, as it contains two vocal chords that vibrate to produce sound.

Trachea:- Larynx is followed by trachea.It is tube about eleven centimeter in length and twenty five centimeter in diameter. Its wall is provided with incomplete C-shape cartiligious ring which keep the trachea in dilated position and prevent it from collapsing.

Bronchi and Bronchioles:- At its lower end, the trachea splits into two primary bronchi.The right bronchus is divided in three bronchi which extend seperatly into the three lobies of right lung.Similarly the left bronchi is divided into two bronchi penetrating into the two lobies of left lung.

The Lungs. Located in the thoracic cavity, there are two lungs, which is the last stop for air within the respiratory tract. Our lungs are a dark colored, spongy bag like structure that is incredibly elastic, allowing for them to expand and contact with each breath. The lungs rest on a sheet of muscle called the diaphragm. The diaphragm is one of the structures that surrounds the thoracic cavity, like the vertebral column and the sternum. The diaphragm forms the floor of the thoracic.

The right lung is divided into three lobies whereas the left lung has two lobies.The lungs are sorrounded by a narrow shape called pleural cavaty.There are two membranes around pleural cavaty.These membrane secret an oily fluid called pleural fluid.Pleural cavity is filled with pleural fluid.

About the Author

Before you try to make money online, make sure you check out Keith Baxter's excellent free video training on work from home business success and affiliate marketing.

Comments

No comments posted.

You do not have permission to comment. If you log in, you may be able to comment.