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skywayscott
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Functions of respiratory system
- A. Gas exchange – intake of O2,
- elimination of CO2
B. Regulates blood pH
C. Vocalization
D. Olfactory receptors
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Functions of the nose
a. provides an airway for respiration
b. moistens and warms air
c. filters and cleanses air
d. location of olfactory receptors
e. adds resonance to voice
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External nose
- 1. hyaline cartilage plates
- attached tofrontal, nasal and maxillary
- bones
2. external openings - external nares (nostrils)
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Nasal Cavities – internal nose
- 1. cavity divided by nasal
- septum (hyaline cartilage) that exits
- through internal nares into pharynx
- 2. contains hair (filtration), numerous blood
- vessels (warms air), and mucus glands
- (traps debris and kills bacteria)
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Paranasal sinuses
1. found in frontal, sphenoid, maxillary, ethmoid bones
- 2. respiratory functions – warm and moisten air,
- trap debris in mucus
3. drain into internal nose
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