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Asthma: Disease of the respiratory system. Asthma: Disease of the respiratory
system Breathing, the act of inhaling and exhaling of air. ...
Respiratory System. INTRODUCTION Through ... respiratory system. The respiratory system
begins with respiratory airways that lead into the lungs. ...
... pressure. It also regulates breathing for the respiratory system. The ... body. The
respiratory system is also interacts with other organs. It ...
Respiratory. The Respiratory System The Respiratory System is made up of the
nose, pharynx, larynx, bronchi, and lungs. The respiratory ...
... and organs in the human body such as the nervous system, the digestive system, the
immune system and the endocrine system, the respiratory system, the kidney ...
Submitted by bc64846 on April 17, 2008
Category: Science
Words: 2356 | Pages: 10
Views: 178
Popularity Rank: 59,890
Average Member Grade: N/A (Add a Comment / Grade this Paper)
INTRODUCTION
Through experimental analysis of the physiological aspects of the human respiratory system, one can truly gain a better understanding of its inner-workings. A deeper look into the anatomy and the physiological mechanisms of the human lungs requires using the knowledge gained from research, lab and coursework of the respiratory system. The respiratory system begins with respiratory airways that lead into the lungs. These airways include nasal passages, pharynx, trachea, larynx, right and left bronchi, bronchioles and clusters of alveoli. The lungs themselves occupy most of the thoracic cavity and each lung is divided into several lobes. The diaphragm and pleural sac are important components to the respiratory system as well. The pleural sac is a thin layer of tissue covering the lungs and the wall of the chest cavity to protect and cushion the lungs. The diaphragm is a sheet of skeletal muscle that lies inferior to the lungs. When this sheet of muscle contracts, air is pulled into the lungs and when the muscle relaxes air is pushed out of the lungs. Alternate contractions and relaxations of the diaphragm and other inspiratory muscles indirectly produce inflation and deflation. Breathing is mechanically accomplished by alternately shifting the direction of the pressure gradient for airflow between the atmosphere and alveoli through the cyclic expansion and recoil of the lungs. Changes in intra-alveolar pressure produce flow of air into and out of the lungs. If this pressure is less than atmospheric pressure, air enters the lungs. If the opposite occurs, air exits from the lungs (Sherwood 2004; Sherwood 2007). The air and blood undergo a gas exchange which occurs in these alveolar air sacs. This occurs through the capillary network around each alveolus, a gas exchange occurs where carbon dioxide is released into the alveolar sacs and into the air (LabTutor 2008). This process is referred to as diffusion – moving from a...
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