Breathing Flashcards
3 centers of respiratory regulation
Respiratory rhythm centre
Pneumotaxic centre
Chemosensitive area
Receptors associated with Co2 and H+ conc.
Aortic arch
Carotid artery
Chemosensitive area
Respiratory organs:
Nostrils Nasal cavity Pharynx Larynx Trachea Bronchi Bronchioles Alveoli
Role of nasal hair
Filter/remove dust,dirt and microorganisms
Role of mucus in nasal passage
Traps dirt
Smooth flow of air
Moisten air
Role of rings of cartilage(ROC) in wind pipe:
ROC helps free flow of air
Prevents air passage from collapse
Muscles present in ribs
Internal Intercostal muscles
External Intercostal muscles
Phrenic muscles
Role if plueral fluid:
To reduce friction on lung surface
Parts of respiratory system
Conducting part
Respiratory/exchange parts
Conducting part from where to where
Nostrils to terminal bronchioles
Respiratory/exchange part
Alveoli+ducts
Role of vessels in nasal passage
Regulates temperature of air
Normal breathing rate
12-16 per minute
Diffusion membrane consists
Squamous epithelial of alveoli
Basement substance
Endothelial of alveolar membrane
Conditions in alveoli
Low temprature
High PO2
Low PCO2
Low H+ conc.
Conditions in tissues:
High temp.
Low P02
High PCO2
High H+ conc.
Breathe through simple diffusion via body surface
Sponges
Flatworms
Coelenterates
Breathing in cockroach
Tracheae
Breathing in earthworm
Moist skin
Steps of respiration
Breathing
External Respiration
Internal transport
Internal Respiration
Cellular Respiration
Enzyme in bicarbonate reaction
Carbonic anhydrase enzyme
