Respiratory System 1

Function
1. Supply Oxygen Remove carbon dioxide
2. Gas exchange
3. Protection from dehydration, temperature change and pathogens
4. Production of sound
5. Olfaction
Respiratory system
1. Conducting portion
  1. Nasal cavities
  2. Nasopharynx
  3. Larynx
  4. Trachea
  5. Bronchi
  6. Bronchioles
  7. Terminal bronchioles
2. Respiratory portion
  1. Respiratory bronchioles
  2. Alveolar ducts
  3. Alveolar sacs
  4. Alveoli
Nasal Cavities and Conchae
1. Divided medially by nasal septum -hyaline
2. PSCC epithelium (roof lined with olfactory epithelium)
3. Conchae - vascular bony shelves
4. Filter warm and incoming air
Nasopharynx
1. PSCC
2. Pharyngeal tonsil- adenoid (enlarged lymphatic tissue at back of nose and throat)
Paranasal sinuses
1. Open into nasal cavity to lighten the skull
2. Assist to moisten and warm air
3. Contain mucous cells which drain in nasal cavity
4. Frontal, ethmoidal, maxillary, sphenoidal
Larynx
1. Connects pharynx to trachea
2. PSCC (vocal cords and epiglottis are SSNK)
3. Phonation
4. Guard against entry of foreign bodies
Vocal cords
1. Glottis - space between
2. Laryngeal muscles control length and size of muscles by moving arytenoid cartillages
3. Sound produced by vibration as air exhaled

Resource summary

	Created by Colleen Curley about 8 years ago

	Copied by will.sciberras almost 8 years ago