Respiratory
System
Pumps
Passive
Diffusion
Internal
respiration
Perfusion—
Respiratory Organ
External
respiration
--Fish, water breathing
delivery of blood to tissues
Cardiovascular
system
Cutaneous
Gills
Lungs
1
Lungs and Gas bladders
Gas bladders—Swim Bladders
Swim
baldders
Single,dorsal
Buoyancy
Lungs
Double,ventral
Hydrostatic organ – swim bladder
Respiratory
Gas transfer
Sound production/reception
Respiratory Tree
Conducting
system
Respiratory
tissue
Amphibians—buccal pump
Reptile – lizard (aspiration pump)
2
Reptile – snake
Diaphragm
Mammal – diaphragm (prehepatic)
Reptile – crocodile (posthepatic)
Mammal – diaphragm (prehepatic)
3
Overview
• Air breathing
dual pump Î buccal pump
(fish)
(amphibians)
• Tradeoffs
breathing vs. feeding
cutaneous
Aspiration pump
Bird
2
1
2
2
2
2 + 1 + 2 + 2+ 2 = 9 Hunter (1758)
Abdominal
LUNG
Interclavicular
Posterior
Anterior
4
COUNTER CURRENT
COUNTER CURRENT
T
Rete
Heat exchanger,
heat block
5