Respiratory System

Respiratory System - RESPIRATORY SYSTEM Chapter 9 11/26/07...

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RESPIRATORY SYSTEM – Chapter 9 11/26/07 Respiration is the means by which animals obtain and use oxygen and eliminate carbon  dioxide  Internal – oxygen is used in mitchochondria  External – breathing in and out of CO2 + oxygen Erythrocytes Lack a nucleus Biconcave disc Contains Hemoglobin o Helps blood transport
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Upper respiratory tract – not located in thoracic cavity Lower respiratory tract – located in thoracic cavity Divided into 2 portions: Gas exchange portion  o molecules in the air sacs of the lungs are exchanged with blood Conduction portion o contains a series of passages that carries air into gas exchange portion Nostrils or Naries  – paired external openings in the nose  - all species have generally 2  - function: to breath or take in air
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Pig – more rigid Horse – more pliable Philtrum – cleft in the nose Nostrils open up to nasal cavity Nasal cavity is separated from oral cavity by the roof of the mouth 2 parts: o Hard palate = palatine rugae o Soft palate = just soft tissues Left and Right Side
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This note was uploaded on 04/30/2008 for the course AVS 331 taught by Professor Jones during the Spring '08 term at Rhode Island.

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Respiratory System - RESPIRATORY SYSTEM Chapter 9 11/26/07...

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