Human Respiration Flashcards
O2 is indirectly used for
Catabolic pricesses
There are 3 stages of respiration
Stage 1= external respiration ( inspiration and expiration)
Btw environment and lungs
Stage 2=internal respiration (gaseous exchange)
Btw lungs and blood
Stage 3= cellular respiration( transport and tissue uptake)
Btw blood and tissue
Human respiratory system includes
Nasal cavity
Pharynx
Larynx (c3 c6)
Trachea
1°bronchi T5
2°bronchi [c shaped cartileginous rings m/o hyaline cartilage]
3°bronchi
Initial bronchioles
Terminal bronchioles
Respiratory bronchioles
Alveolar duct & atrium
Alveolar sac &alveoli
Conducting or transport region includes
Nasal cavity
Pharynx
Larynx
Trachea
1°bronchi
2°bronchi
3°bronchi
Initial bronchioles
Terminal bronchioles
Functions of conduction region
Filtration of air
Humidification
Regulates air temp to match that of body temp
Dsv=
150ml
- Thoracic cavity is an anatomically
Anatomically air tight chamber
Respiratory zone includes
Respiratory bronchioles
Alveolar duct and atrium
Alveolar sac and alveoli
Functions of respiratory zone
Exchange of gases with blood
Nasal cavity has 2 parts
Anterior and posterior
Anterior (hairs&skin) traps foreign materials
Posterior (bony ridges) cilliated moves trapped bacteria to stomach
Glandular traps bacteria
Larynx/sound box
By vibration/expiration
Respiratory zone consists of
( Respiratory bronchioles
Alveolar duct and atrium
Alveolar duct and Alveoli)
Type 1 pneumocyte
Type 2 pneumocyte
And
Diffusion membrane
Type 1 pneumocyte
Simple squamous
Division of gases
Type 2 pneumocyte
Simple cuboidal
Secrete lecithin (surfactant prevents alveoli from collapsing)
Diffusion membrane
Simp. Sq. Of alveoli
Basement substances
Endothelium of capillary
0.2 mm thick
