Respiratory System

 It is the main thing to help you live. Oxygen dioxide is the primary gas that the blood gets rid of. The upper structures of the respiratory system are combined with the sensory organs of smell and taste and the digestive system. When you inhale (breathing in) your skeletal muscle and the diaphragm contract, which then enlarge the chest cavity and cause the lungs to draw in air. This creates a partial vacuum in the thoracic cavity, air passes through the nose, pharynx, larynx, trachea, and then into the two bronchi to the lungs. Oxygen and carbon dioxide pass between the blood and the air in the alveoli, which are at the end of the smallest bronchi. Oxygen diffuses from the inhaled air through the alveoli walls into the capillaries. The lungs contain more than 300 million alveoli. When you exhale or breathe out, your skeletal muscles and diaphragm return to the relax position which decrease the size of the chest cavity and therefore pushes the air out of the lungs. The rib cage serves as a structural support for the whole thoracic arrangement, and peural membranes help provide lubrication for the respiratory organs so that they are not chaffed during respiration. The air we exhale contains 100 times more carbon dioxide than inhaled air. In a resting position a healthy individual will inhale and exhale approximately 16 time per minute. !

  FUNCTIONS

To provide intake and output of air, and for he exchange of gases in blood and in the air.

  ORGANS

Organs in this system include Nasal Cavity, Pharynx, larynx, trachea, bronchi, and lungs.

Diseases

Asthma

  Pneumonia

  Emphysema

  Sinus Infection

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