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41-3 Bony fishes

41-3 Bony fishes. Delivers oxygen and nutrients to cells of the body Transports wastes of metabolism (carbon dioxide and ammonia) to gills and kidneys for elimination. *System Heart, blood vessels, blood arteries carry blood away from heart veins carry blood to the heart

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41-3 Bony fishes

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  1. 41-3 Bony fishes

  2. Delivers oxygen and nutrients to cells of the body Transports wastes of metabolism (carbon dioxide and ammonia) to gills and kidneys for elimination *System Heart, blood vessels, blood arteries carry blood away from heart veins carry blood to the heart capillaries assist I. Circulatory system

  3. I. Circulatory system 4 chambers of HEART 1.sinus venosus: collecting chamber for deoxygenated blood 2.atrium: contracts and sends blood on 3.ventricle: muscular and main pumping chamber 4.conus arteriosus: contains valves which prevent blood from flowing backwards

  4. I. Circulatory system Blood flow: heart  gills  body  heart arteries arteries veins

  5. II.Respiratory System • Water taken in mouth and pumped over gills, water flows across gill filaments and exits behind operculum • Blood flows towards head to allow more oxygen to diffuse. This is called counter-current flow and makes gills an efficient organ for gas exchange. • Gills and kidneys both work in balance between salt and water in body of fish.

  6. III. Excretory system • Elimination of liquid wastes • Kidneys filter urine which contains ammonia, ions of sodium and chlorine and water • (4) Urinary bladder is the storage place for urine before it is eliminated

  7. IV. Nervous system • Brain, spinal cord, and nerves • Draw and number (1-6) parts of brain on p. 812, fig. 41-13 1.olfactory bulb: process smell, detects chemicals in water 2.cerebrum: forebrain, sensory and other types of information 3.optic tectum: midbrain, processes information from fish’s auditory and lateral line systems. Lateral line system is a row of sensory structures that run length of body which detects vibrations 4.cerebellum: hindbrain, coordinates motor output 5.medulla oblongata: hindbrain, passes nerve impulses 6.spinal cord: carries nerve impulses to and from brain

  8. IV. Nervous system

  9. V. Reproduction • Eggs produced by ovaries • Sperm produced by testes • Fertilization is external so many eggs are layed • Reproduction is known as spawning

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