Tuesday, October 16, 2012

The respiratory system must work continously to prevent death. It consists of the lungs and air passages. The nose, pharynx, larynx, trachea, bronchi, alveoli and the lungs are parts of the respiratory system. Taking in oxygen, a gas needed by all body cells, and removing carbon dioxide, is the systems responsibility.

Air enters through the nostrils. The nasal septum divides into nasal cavities. The cilia trap particles toward the esophagus. Sinuses are cavities in the skul that surround the nasal area. The sinuses also provide resonance for the voice. The pharynx, or throat, lies directly behind the nasal cavities. Air enters the pharynx as it leaves the nose. There are three sections of the pharynx . The nasophrynx is the upper portion. The oropharynx is the middle section. And the bottom section is the laryngopharynx. The larynx is the voice ox, it lies between the pharynx and tha trachea. It has nine layers of cartilage. It contains two folds called vocal cords. As air leaves the lungs the vocal  cords vibrate and produce sound. The epiglottis is a piece of cartilage tghat closes the opening into the larynx during swallowing. The trachea carries air between the pharynx and the bronchi. Each bronchi enters a lung and carries air from the trachea to the lungs

Ventilation is a process of brething it includes two phases inspirtation and expiration. inspiration is breathing int air. Respiration process for inspiration is when the diaphragm and the intercostal muscle contract and enlage the throracic cavity the air goes through the airways to the aveoli where gas exchange takes place. Expiration is when air is forced out of the lungs and air passages. Repiration for expiration is when air increased amount of carbon dioxide in the blood or decrease amount of oxygen causes the center to increase the rate of respiration.

The main 2 stages of the respiratory system are external and internal respiration. External respiration is the exchange of oxygen and carbon dioxide between the lungs and bloodstream. Breathed in through the respiratory system is oxygen and then it enters the alveoli. Carbon dioxide is known as a metablic waste and it is also carried in the bloodstream.The next stage is the opposite of extenal instead of exchange of oxygen and carbon dioxide its the exchange of oxygen and carbon dioxide between the tissue cells and bloodstream. The oxygen is carried to the tissue cells by the blood. The cells then use the oxygen and nutrients to produce energy, water, and carbon dioxide. Thats the process of cellular respiration. In cellular respiration the carbon dioxide concentration is higher in tissue cells than in the bloodstream, carbon dioxide leaves the cells and enters the bloodstream to nbe transported back to the lungs, where external respiration takes place.

Everyone at least knows one person that has Asthma. Understanding how to treat & avoid asthma is the question everyone has. Asthma is a respiratory disorder usually caused by a sensitivity to an allergen such as dust, pollen, an animal, or a food. Pre-Signs such as difficult breathing, wheezing, coughing accompanied by expectoration of sputum, and tightness in the chest, could be a warning for an Asthma attack. Asthma attacks occur when the bronchioles, mucus production increases, and edema develops in the mucosal lining. Asthma can be treated with Bronchodilators, Anti-Inflammatory medications, Epinephrine, and Oxygen Therapy. Identification of your allergens could help prevent asthma attacks.

Smoking is an 80 - 90% cause of lung cancer, and causes 160,000 cancer deaths.There are 3 types of lung cancer and they are Small Cell, Squamous Cell, and Adenocarcinoma. Lung Cancer is the leading cause of cancer death in both men and women. LUNG CANCER IS PREVENTABLE! Avoid exposure to carcinogens in tobacco, either directly or second hand smoke.

No comments:

Post a Comment