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Fish

Fish. Characteristics of Fish 1. Obtaining Oxygen 2. Circulatory System 3. Movement 4. Reproduction 5. Nervous System B. Types of Fish 1. Jawless 2. Cartilaginous 3. Bony. Fish. Characteristics of Fish 1. Obtaining Oxygen 2. Circulatory System

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Fish

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  1. Fish • Characteristics of Fish 1. Obtaining Oxygen 2. Circulatory System 3. Movement 4. Reproduction 5. Nervous System B. Types of Fish 1. Jawless 2. Cartilaginous 3. Bony

  2. Fish • Characteristics of Fish 1. Obtaining Oxygen 2. Circulatory System 3. Movement 4. Reproduction 5. Nervous System B. Types of Fish 1. Jawless 2. Cartilaginous 3. Bony • Vertebrates • Fins • Live in water • Gills • Ectotherms • Scales

  3. Fish • Characteristics of Fish 1. Obtaining Oxygen 2. Circulatory System 3. Movement 4. Reproduction 5. Nervous System B. Types of Fish 1. Jawless 2. Cartilaginous 3. Bony The fish pulls water into its mouth. Oxygenated water passes over the gills. Gills take Oxygen from water and release carbon dioxide. Water then passes out of fish through gill slits.

  4. Fish • Characteristics of Fish 1. Obtaining Oxygen 2. Circulatory System 3. Movement 4. Reproduction 5. Nervous System B. Types of Fish 1. Jawless 2. Cartilaginous 3. Bony Fish have a closed circulatory system. A two chamber heart pumps blood in one loop. Blood goes from the heart to the gills, from the gills to the rest of the body where the oxygen is used, and then from the body back to the heart.

  5. Fish • Characteristics of Fish 1. Obtaining Oxygen 2. Circulatory System 3. Movement 4. Reproduction 5. Nervous System B. Types of Fish 1. Jawless 2. Cartilaginous 3. Bony Fins provide fish with a larger surface area with which to push against water. This helps with speed and efficiency.

  6. Fish • Characteristics of Fish 1. Obtaining Oxygen 2. Circulatory System 3. Movement 4. Reproduction 5. Nervous System B. Types of Fish 1. Jawless 2. Cartilaginous 3. Bony External fertilization, spawning,is method used by most fish. Female lays eggs in water. Male spreads a cloud of sperm over the eggs. Internal fertilization occurs in few species. Eggs are fertilized and develop inside the female. The female gives birth when the young are mature enough to live independently.

  7. Fish • Characteristics of Fish 1. Obtaining Oxygen 2. Circulatory System 3. Movement 4. Reproduction 5. Nervous System B. Types of Fish 1. Jawless 2. Cartilaginous 3. Bony Central nervous system, consisting of the brain and spinal cord, is the primary integrating mechanism. Peripheral nervous system, consisting of nerves that connect the brain and spinal cord to various body organs, carries sensory information from special receptor organs such as the eyes, internal ears, nares (sense of smell), taste glands, from environment to the brain

  8. Fish • Characteristics of Fish 1. Obtaining Oxygen 2. Circulatory System 3. Movement 4. Reproduction 5. Nervous System B. Types of Fish 1. Jawless 2. Cartilaginous 3. Bony No jaws or scales Mouths contain radula-like structures for scraping , stabbing and sucking living or decaying tissues Ex. Lampreys Parasites that attach themselves to other fish and feed off of them Ex. Hagfish Scavengers that feed on dead fish

  9. Fish • Characteristics of Fish 1. Obtaining Oxygen 2. Circulatory System 3. Movement 4. Reproduction 5. Nervous System B. Types of Fish 1. Jawless 2. Cartilaginous 3. Bony Jaws, scales and skeletons made of cartilage Usually carnivores Ex.Sharks Poor eyesight, great ability to smell Can’t pump water over gills, so need to be moving or in current Ex. Skates and Rays Spend most time partially buried in sand Gill stills on ventral side

  10. Fish • Characteristics of Fish 1. Obtaining Oxygen 2. Circulatory System 3. Movement 4. Reproduction 5. Nervous System B. Types of Fish 1. Jawless 2. Cartilaginous 3. Bony Skin covered with denticles Five to seven gill slits per side No swim bladder Internal fertilization Five to seven gill arches loosely attached lower jaws

  11. Fish • Characteristics of Fish 1. Obtaining Oxygen 2. Circulatory System 3. Movement 4. Reproduction 5. Nervous System B. Types of Fish 1. Jawless 2. Cartilaginous 3. Bony Jaws, scales, skeleton made of bone, swim bladder Swim bladder helps fish stay in varying depths of water with minimal energy use. 95% of all fish fit into this category Ex. Trout, goldfish, walleye, perch, tuna

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