1. Practice Quiz Fish

2. Class AgnathaHagfish Hagfish feed on dead or dying fishes

3. Class AgnathaLamprey Lampreys attach to other fishes and suck their blood. Note the oral disc with horny teeth that can act as a rasp to cut a hole in the fish they attach themselves to.

4. 1. Mouth 2. Liver 3. Spiral Valve 4. Cloaca 5. Opening of cloaca 6. Rectal gland What is the function of #6?Salt secretion Chondrichthyes

5. Placoid scales Sharks have placoid scales CycloidCtenoid

6. What is the function of this sensory system? The drawing shows the lateral line system of a shark. Boney fishes also have a lateral line system. The lateral line system allows the animal to detect shock waves in water just like your eardrum responds to shock waves in air. This allows the animal to detect movement in the water column such a swimmer kicking in the water.

7. 1. Pectoral fin 2. Pelvic fin 3. Lateral line 4. Anal fin 5. Caudal fin 6. Posterior dorsal fin 7. Anterior dorsal fin 8. Operculum

8. Kingdom?Phylum?Subphylum?Class? Common name?Ratfish AnimaliaChordataVertebrataChondrichthyes

9. This shark has a heterocercal tail. 1. Rostrum 2. Mouth (Sharks have a ventral mouth) 3. External gill slits 4. Pectoral fin (Notice it is large and “wing-like”.) 5. Pelvic fin 6. Clasper (The presence of a clasper makes this shark a male) 7. Caudal fin (Heterocercal tai) 8. Posterior dorsal fin 9. Anterior dorsal fin 10. Lateral line 11. Spiracle (a modified gill slit)

10. 1. Gill Arch 2. Gill Raker

11. The holes are openings of sensory structures called Amullae of Lorenzini. These sensory structures allow the shark to detect minute electrical currents.

12. 1. Gill Arch 2. Gill Raker 3. Gill Arches

13. Heterocercal Swim bladder Homocercal

14. This fish is a whale shark. It is the largest living fish. How does this animal feed?Whale sharks are filter feeders that feed on plankton.

15. ChordataAnimaliaOsteichthyes Parrot fish

16. 1. Stomach 2. Pyloric caeca 3. Intestine 4. Esophagus 5. Stomach 6. Intestine 7. Pyloric caeca

17. 1. Heart 2. Vein 4. Artery 3. Capillary bed (the site of gas exchange) This is where oxygen leaves the blood and enters the tissues