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The respiratory system consists of tubes that filter incoming air and transport it into the alveoli where gases are exchanged

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Introduction

´╗┐Respiratory System The respiratory system consists of tubes that filter incoming air and transport it into the alveoli where gases are exchanged.The entire process of exchanging gases between the atmosphere and body cells is called respiration and consists of the following: ventilation, gas exchange between blood and lungs, gas transport in the bloodstream, gas exchange between the blood and body cells, and cellular respiration. The respiratory system contains organs such as the nose, nasal cavity, pharynx, larynx, trachea, bronchial tree and lungs which provides an important role in the proper function of the human body and respiratory system. The organs of the respiratory system can be divided into two groups; the upper respiratory tract includes the nose, nasal cavity, sinuses, and pharynx, and the lower respiratory area larynx, trachea, bronchial tree, and lungs. The nose is supported by bone and cartilage, provides an entrance for air in which air is filtered by hairs inside the nostrils. The nasal cavity is a space posterior to the nose that is divided by the nasal septum. Nasal conchae divide the cavity into passageways that are lined with mucous membrane, and help increase the surface area available to warm and filter incoming air and mucus plays a role also. ...read more.

Middle

Specialized cells in the lung tissue form an important role in the immune system. Hairlike cilia on some cell sweep invaders out of the airways and others detect and pick up foreign matter in the air sacs. The diaphragm?s job is to help pump the carbon dioxide out of the lungs and into the lungs. Ventilation (breathing), the movement of air in and out of the lungs, is composed of inspiration and expiration. Atmospheric pressure is the force that moves air into the lungs. When pressure on the inside of the lungs decreases, higher pressure air flows in from the outside. Air pressure inside the lungs is decreased by increasing the size of the thoracic cavity; due to surface tension between the two layers of pleura, the lungs follow with the chest wall and expand. Muscles involved in expanding the thoracic cavity include the diaphragm. As the lungs expand in size, surfactant keeps the alveoli from sticking to each other so they do not collapse when internal air pressure is low. The forces of expiration are due to the elastic recoil of lung and muscle tissues and from the surface tension within the alveoli. ...read more.

Conclusion

If the lung cancer is made up of both types, it is called mixed small cell/and large cell cancer. Lung cancer is the most deadliest form of cancer for both men and women in the United States. Lung cancer is more common in older adults. Cigarette smoking is the leading cause of lung cancer; furthermore more cigarettes you smoke per day and the earlier you start smoking, the greater your risk for Lung cancer. Also lung cancer have occurred in people that haven't smoked, which the factors for that are high levels of pollution, asbestos, high levels of arsenic in drinking water, and harmful chemicals that your body are exposed to. According to the American Cancer Society, an estimated 3,000 non-smoking adults will die each year from lung cancer related to breathing secondhand smoke. The most interesting fact is that lung cancer is a genetic disease. The Respiratory System is important because it contains a very important organ called the lungs. In order for the Respiratory System to maintain homeostasis it functions with the cardiovascular and nervous system. Without the Respiratory System the body wouldn't have oxygen which is needed to operate and wouldn?t be able to exhale carbon dioxide. Citation Marieb, Elaine Nicpon. Essentials of human anatomy and physiology. 5th ed. Menlo Park, Calif.: Benjamin/Cummings Pub. Co., 1997. Print www.betterhealth.viv.org www.nlm.nih.gov www.science.naturalgeographic.com www.thoracic.org ...read more.

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