Vertebrate Gas Exchange Flashcards
respiratory surfaces require
thin walls
moist
rich blood supply
big surface area
gills arose as
small pouches - simple sacs
elasmobranchs
gill pouches seen before gills form
buccal pump
mouth floor moves down
draw in water
mouth close
water forced across opercular gills
shark force pump
combo of suction and pressure
force generated to open gill flaps and force water across gills
mudskipper
respiratory epethelia
hold air nect to highly vascularise thing epethelia
how do crucian carp avoid hypoxia
steep in ethanol to reduce metabolism
aspiration pump
stiff dermal armour - following contraction armour produces elastic recoil which expands lung
lumgfish respiration
gulp air forcing it into lungs and expanding collapsed lungs
amphibians use what to force air into lungs
pressure pump
unidirectional air flow in birds
mouth trachea syrinx primary bronchii posterior air sacs dorsobronchi parabronchi ventrobronchi anterior air sacs trachea mouth
alligator lungs
multi lobed
assumed to be tidal
mammalian lung
highly branched
covered in surfactant to reduce surface tension
which lung is inflated through diaphragm , intercostal muscles and exhalation through elastic recoil
mammalian
dual Action shark force pump
buccal and opercular cavities compressed whilst valves close
buccal cavities expand and draws in water whrlilst valves now open
water moves into buccal cavity and across gills
valve closes and forces water across gills through opercular valve