1 / 24

Chapter 39 Fishes

Chapter 39 Fishes. Section 3 Bony Fishes. Characteristics. Class Osteichthyes Bone - harder & heavier than cartridge Lungs - early bony fishes Swim bladder- gas-filled sac that is used to control buoyancy Scales - protect fish and reduce friction when swimming. Lobe-finned fishes.

cheri
Télécharger la présentation

Chapter 39 Fishes

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 39Fishes Section 3 Bony Fishes

  2. Characteristics • Class Osteichthyes • Bone- harder & heavier than cartridge • Lungs- early bony fishes • Swim bladder- gas-filled sac that is used to control buoyancy • Scales- protect fish and reduce friction when swimming

  3. Lobe-finned fishes • Fleshy fins supported by a series of bones • Lungfish and coelacanth • Lungfish- exchange gas through lungs and gills (Live in tropical ponds) • Coelacanth- live deep in the ocean

  4. Lungfish

  5. Coelacanth

  6. Ray-finned fishes • Do not have fins with a central bony axis- fins supported by bony-rays • Evolved from scales • Familiar fish- trout, goldfish, eels, bass, guppies, salmon, perch, etc.

  7. Trout

  8. Perch

  9. Goldfish

  10. External Anatomy • Operculum- hard plate that opens at the rear and covers and protects gills • Fins- swimming and navigation • Caudal fin- tail fin • Two dorsal fins (anterior & posterior) • Ventral anal fin- helps move in a straight line • Pelvic fins- orient body

  11. External Anatomy • Skin- scales • Scales grow with fish • Scales overlap like shingles on roof

  12. Internal Anatomy • Skeleton- skull, spinal column, pectoral girdle, pelvic girdle, and ribs • Pectoral girdle- supports pectoral fish • Digestive: Jaws, pharynx, esophagus, stomach, intestine, liver, gallbladder, pancreas, anus

  13. Internal Anatomy • Circulatory- gills, heart, capillaries

  14. Respiratory and Excretory • Countercurrent Flow- causes more oxygen to diffuse into the blood • Urine • Urinary bladder

  15. Swim Bladder • Sac filled with oxygen, carbon dioxide, and nitrogen • Adjust their buoyancy based on swim bladder

  16. Nervous System • Brain • Optic tectum- receives and processes information from the fish’s visual, auditory, and lateral-line systems

  17. Reproduction • External • Lay large numbers of eggs to ensure survival of species • Spawning- reproduction • Migrate to warm waters to spawn

  18. REVIEW!!! • List three key features that characterize bony fishes. • Describe the external anatomy of fish. • Name the importance of swim bladder.

More Related