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Respiratory System

Respiratory System. Structures & Functions. The organs of the respiratory system include Nose Pharynx Larynx Trachea Bronchi Lungs Accessory organs Diaphragm Thorax. Structures & Functions.

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Respiratory System

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  1. Respiratory System

  2. Structures & Functions • The organs of the respiratory system include • Nose • Pharynx • Larynx • Trachea • Bronchi • Lungs • Accessory organs • Diaphragm • Thorax

  3. Structures & Functions • The process of respiration involves the inspiration of air that contains O2 for use by the cells of the body and the expiration of CO2, which is a waste product from the cells of the body. • The respiratory system relies on the circulatory system to complete the respiratory cycle.

  4. Structures & Functions • O2 is inhaled into the lungs and transported by the blood. • The blood then transports waste products back to the lungs to be exhaled.

  5. Nose • Naso or rhino mean nose • Acts as an entrance for air and exit for CO2. • Mucous membrane lines the nose. • Acts as a filter for dust and other foreign matter • The nose also warms and moistens the entering air. • Contains olfactory receptors.

  6. Nose • The nostrils are paired external openings to the airways. • Very in pliability and expandability • Horse – expandable nostrils • Pig – rigid nostrils

  7. Pharynx • AKA the throat • The upper portion of the pharynx is attached to the base ok the skull and the lower portion unites with the esophagus. • Divided into three parts • Nasopharynx • Opening into the back of the nasal chambers • Oropharynx • Opening into the back of the mouth • Laryngopharynx • Opening into the larynx and esophagus

  8. Pharynx • The pharynx is used by both the respiratory and the digestive tracts as a passageway for air and food • Depending on the species, it may also have a role in vocalization.

  9. Larynx • The larynx is commonly called the voice box and is located just below the pharynx. • Epiglottis • a lid like cartilage structure that prevents food from entering the airway during swallowing • Main sound organ in mammals

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