respiratory1 - Pg. 442 - 453 Function: Obtain oxygen and...

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Pg. 442 - 453 Function: Obtain oxygen and remove carbon dioxide Tubes that filter air and air sacs for gas exchange Respiration – movement of air into and out of lungs (ventilation), gas exchange between blood and the air in the lungs (external respiration), gas transport in blood between the lungs and body cells, gas exchange between blood and cells (internal respiration) cellular respiration Organs of Respiratory System Upper respiratory tract – nose, nasal cavity, paranasal sinuses, pharynx Lower respiratory tract – larynx, trachea, bronchial tree, lungs UPPER: 1. Nose o Nostrils – opening for air to enter and leave nasal cavity; internal hairs that filtrate air 2. Nasal cavity – space behind the nose; divided by nasal septum (bone/cartilage) into right and left parts o Nasal conchae – bones that curl from walls of nasal cavity dividing it into passageways; support mucous membrane and increases its surface area o Mucous membrane – pseudostratified ciliated epithelium with goblet cells; blood vessel network; sticky mucus entraps dust and particles o Cilia move and push mucus with the entrapped particle toward pharynx, where the mucus is swallowed and gastric juice destroys the particles 3. Paranasal sinuses
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This note was uploaded on 01/26/2012 for the course ECON 201 taught by Professor Girlkthie during the Spring '04 term at Cornell College.

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respiratory1 - Pg. 442 - 453 Function: Obtain oxygen and...

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