Term
| Circulatory system has low blood volume |
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Definition
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Term
| Circulatory system has slow turnover of blood |
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Definition
| takes about 5 mins; blood pressure drops 50% at gills, flows sliggish through rest of body |
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Term
| Circulatory system has one pump, one circuit system |
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Definition
| blood goes once through heart, out to system, back to heart |
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Term
| Heart has 4 in-line chambers: Sinus venosus |
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Definition
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Term
| Heart has 4 in-line chambers: Atrium |
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Definition
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Term
| Heart has 4 in-line chambers: Ventricle |
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Definition
| most muscular, largest pressures |
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Term
| Heart has 4 in-line chambers: Conus or belbus arteriosus |
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Definition
| conus in chondrichthians and primitive fishes. bulbus in teleosts. conus is muscular, has valves to prevent backflow into heart as ventricle rebounds. bulbus is nonmuscular but elastic and depulses flow |
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Term
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Definition
| fluid filled sac that surrounds heart |
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Term
| Major Vessels to and from gills |
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Definition
| ventral aorta(single) -> afferent branchial arteries (paired) -> efferent branchial arteries |
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Term
| Major Vessels; other arteries |
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Definition
| efferent branchial arteries to dorsal aorta -> paired anteriorly, where flow enters from gills -> directs flow to carotid arteries, brain, etc -> unpaired posteriorly, runs ventral to centra -> other arteries give off from dorsal aorta to guts/musc.->@caudal vert. dorsal aorta turns into caudal artery running through hemal arches |
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Term
| Major Vessels: major veins |
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Definition
| caudal vein, vent to caudal artery in hemal arches, flow from musc. -> blood to kidneys from caudal vein and artery -> postcardinal vein, return from kidneys, gonads and musc.-> anterior cardinal vein, venous flow from head-> common cardinal vein,joining of anterior and postcardinal veins to sinus venosus->separate return to sinuc venosus from livr and gut via hepatic portal |
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Term
| Components of blood: plasma |
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Definition
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Term
| components of blood: blood cells: leukocytes |
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Definition
| white blood cells; for immune response, clotting, eating foreign particles |
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Term
| components of blood: blood cells: erythrocytes |
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Definition
| red blood cells; carry hemoglobin for o2 transport; some fish dont have them (antarctic fishes) |
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Term
| Hemoglobin structure: tetrametic Hb |
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Definition
| 4 polypeptide chains, one heme; structure similar to mammalian Hb; agnathans: monomeric Hb |
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Term
| Function: o2 uptake and release: o2 dissociation curve: amount of o2 taken up by Hb increases: |
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Definition
| w/partial pressure of o2(amount in solution in plasma) |
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Term
| Function: o2 uptake and release: o2 dissociation curve: half saturation point (P50) |
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Definition
| oxygen tension(partial pressure) at which blood is half saturated |
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Term
| Function: o2 uptake and release: o2 dissociation curve: shape |
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Definition
| typically sigmoid in shape bc of tetrameric molecular structure |
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Term
| Function: o2 uptake and release: effect of pH change: blood pH drops |
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Definition
| when there is higher CO2(areas of metabolic activity) |
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Term
| Function: o2 uptake and release: effect of pH change: bohr effect |
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Definition
| conformation of Hb changes and reduces affinity |
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Term
| Function: o2 uptake and release: effect of pH change: root effect |
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Definition
| in some fishes, also lower oxygen capacity (reduction of asymptotic saturation) |
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Term
| Function: o2 uptake and release: effect of pH change: result |
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Definition
| Hb unloads oxygen in tissues where there is metabolic acitivty |
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Term
| Function: o2 uptake and release: diversity among fishes: effect of habitat |
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Definition
| fish in lower oxygen waters have lower P50 |
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Term
| Function: o2 uptake and release: effect of pH change: diversity among fishes: activity level |
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Definition
| active fishes, higher bohr shift |
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Term
| Main blood vessels of bony fish blood cycle |
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Definition
| heart -> ventral aorta -> afferent branchial artery -> efferent branchial artery -> brain carotid artery and dorsal aorta -> pectoral girdle subclavian artery -> viscera coeliac artery -> viscera superior mesenteric artery -> muscles caudal artery -> return caudal vein -> return postcardial vein -> duct of cuvier -> sinus venosis -> heart |
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