PPT-FISH GILLS In health and in disease

By Dr Jo Bannister BSc Animal Sc Hons BSc BVMS amp Dr Richmond Loh BSc BVMS MANZCVS Aquatics MPhil Path MANZCVS Pathobiol A presentation using NORMAL GILL FORM AND FUNCTION. BIOLOGY. At 31,500 species, fish exhibit greater species diversity than any other class of vertebrates.. Three Classes of Fish. Agnathan. : Jawless fish, . *Hagfish, . Lamprey. Chondrichthyes. : Cartilaginous Fish . 13.3 Gas exchange in fish. Learning outcomes. Students should be able to understand the following:. The structure of fish gills and how water is passed along them. The difference between parallel flow and . Characteristics of all Fish. All fish are . aquatic. All fish are . vertebrates. All fish have . gills. All fish have appendages in the form of . fins. Most. fish have skin with . scales. Different Groups of Fishes. Gas exchange in humans – Why is this not an efficient system for fish??????. Why do fish gills need to be so efficient?. Oxygen not very soluble in water. Surface water = 5 . ppm. . cf. 210,000 . Characteristics of all Fish. All fish are . aquatic. All fish are . vertebrates. All fish have . gills. All fish have appendages in the form of . fins. Most. fish have skin with . scales. Different Groups of Fishes. Subphylum Vertebrata: . Vertebrae surround nerve cord and serves as a primary . support. ; skeleton modified . into . a skull for protection of the brain. .. This group includes . fish, amphibians, reptiles, birds, and mammals. General characteristics. Most fish have 7 fins.. Many fishes have well-developed eyes and a keen sense of vision that they rely upon to find and capture food, avoid predation, locate shelter and find a mate. Many fishes see color and some are able to see in very low light levels.. VANESSA RAMIREZ. YAYLYN LAZO. JOSUE FLORES . PERIOD-6. Marine science/ Mrs. Weber. TABLE OF CONTENTS . Slide 3…………………………….Scientific name. Slide 4…………………………….What they eat. When we put those two studies together what do we get?. Study of disease in fish populations and the factors that determine its occurrence.. Links to many other fields . Clinical medicine. Laboratory medicine. Subphylum Vertebrata: (. craniata. ). Superclass. :. . Agnatha. (jawless fish). . Class:. . Cyclostomata. (jawless vertebrates: lampreys and hagfishes). . Order : . Petromyzontia. . . Order :. ‘. Branchia. ’ in . greek. = ‘gills’. In bony fish (Teleosts): . Gills lie in a . branchial. cavity covered by the operculum:. Usually two sets of four . holobranchs. Each . holobranch. consists of two . Learning outcomes. Students should be able to understand the following:. The structure of fish gills and how water is passed along them. The difference between parallel flow and . countercurrent. flow. Barbara Leary and Amy . Vallis. AP Biology. Ms. Bergman. April 8, 2011. BODY STRUCTURE AND COVERING. BONY FISH (. Teleosts. ). Scales are flatter covered by thins layers of skin and mucus making them slippery. Columnaris. disease ( Saddleback disease). . The disease is brought in many cases by fish that have been badly handled, and often have been subjected to stress. Among predisposing factors often noted, is a sudden rise in temperature. And the disease most frequently appears, when water temperature is above 64.