LEC 11 BIOL 431
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1
What are the 4 processes of the respiratory system?
1. Pulmonary ventilation - moving air in an out of the lungs & alveoli’s
2. external respiration - gas exchange between blood & alveoli
3. transport of respiratory gases - between lungs and body circulatory system
4. internal respiration - gas exchange between blood and tissues
2. external respiration - gas exchange between blood & alveoli
3. transport of respiratory gases - between lungs and body circulatory system
4. internal respiration - gas exchange between blood and tissues
2
What are the two anatomical division of the respiratory system?
upper respiratory - nose, pharynx
lower respiratory - larynx trachea bronchi lungs
lower respiratory - larynx trachea bronchi lungs
3
what are the 2 functional division of the resp system?
Conducting
Resppiratory zone
Resppiratory zone
4
What is the conduction zone of the resp system?
Support structure & tubes conducting air external to lungs (nose > terminal bronchioles)
5
What is the respiratory zone?
Where gas exchange takes place (respiratory bronchioles > alveoli’s)
6
Where is the olfactory mucousa found? What its function?
Respiratory region of nasal cavity and for smell
7
What are the cavities around the nasal cavity in the skull?
What are there functions?
What are there functions?
Frontal Sinus, Ethmoid Sinus, Sphenoidal Sinus, Maxilary Sinus
Lightens skull, mucus production, resonant chamber for sound
Lightens skull, mucus production, resonant chamber for sound
8
What is the function of the pharynx? What are the 3 sections?
Transport air and food
Nasopharynx, Oropharyn, Laryngopharynx
Nasopharynx, Oropharyn, Laryngopharynx
9
What is the function of the larynx and what anatomical structure is involved?
Directs air and food to appropriate place via epiglottis
Seperation of resp system and digestive
Seperation of resp system and digestive
10
What are some fact about the trachea?
Air only
4in long 2.5cm did
Divides @ corina to R & L pulmonary bronchi
4in long 2.5cm did
Divides @ corina to R & L pulmonary bronchi
11
What are the 3 sections of Bronchi in order?
Primary, Secondary (lobar), Tertiary
12
How many secondary Bronchi are there in each lung?
3 = R 2 = L
13
What are the 2 sections of bronchioles?
Terminal bronchioles, respiratory bronchioles
14
What changes once we get to the terminal bronchioles?
Cartilage rings disappear
Turns too smooth muscle bands
parasympathetic & histamines = constriction (ie Asthma)
Sympathetic (ie epinephrine) = Dilation
Turns too smooth muscle bands
parasympathetic & histamines = constriction (ie Asthma)
Sympathetic (ie epinephrine) = Dilation
15
Where do the respiratory bronchioles lead to?
Aleveolar duct
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