Respiration; buccal and opercular pumps

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Adaptive strategies: a trend toward the separation of the organs dealing with oxygen uptake and carbon dioxide discharge. Most air-breathers have evolved a new organ by modifying some existing structure. This new organ deals with oxygen uptake from the air. Elimination of carbon dioxide is done by way of the gills. A few air-breathers have evolved a new respiratory organ by modifying an existing structure for oxygen uptake, but, at the same time, the gills have become greatly reduced. Scales are reduced as well and the skin is used for the discharge of carbon dioxide. Swamp eels (Synbranchiformes) and the goby genus Periophthalmus fall into this latter category.
What is the biological significance of air breathing? 1. Survival in oxygen poor habitats 2. Utilization of terrestrial food resources 3. Abandon drying ponds to search for better habitat 4. Invade new territories and thus enhance distribution
Page 1 and 2: BIOLOGY OF FISHES FISH/BIOL 311 FUN
Page 3 and 4: The average human can utilize only
Page 5 and 6: Within the pattern, however, can be
Page 7 and 8: Diagrammatically, we can express th
Page 9 and 10: Phase 3: The Buccal Pressure Pump:
Page 11 and 12: The timing of the expansion and con
Page 13 and 14: With sensitive pressure transducers
Page 15 and 16: In other pelagic forms, the pumps m
Page 17 and 18: In truly benthic forms, especially
Page 19 and 20: 3. STRUCTURE AND FUNCTION OF GILLS
Page 21 and 22: In all bony fishes there are muscle
Page 23 and 24: Deoxygenated blood reaches the gill
Page 25 and 26: Three-dimensional cut-away view thr
Page 27 and 28: List of Air-breathing Fishes Arrang
Page 29 and 30: Lateral views of the gill arches of
Page 31: Gills are never used for air breath

Respiration; buccal and opercular pumps

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