1 / 20

Chordates and Fish

Chordates and Fish. Members of the ANIMAL KINGDOM and the PHYLUM CHORDATA They have a dorsal, hollow nerve cord and a notocord. What is a chordate?. pharyngeal pouches (become gills) Tail - extends beyond anus Most chordates are vertebrates (SUBPHYLUM VERTEBRATA). Chordates have.

jela
Download Presentation

Chordates and Fish

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. Chordates and Fish

  2. Members of the ANIMAL KINGDOM • and the PHYLUM CHORDATA • They have a dorsal, hollow nerve cord • and a notocord What is a chordate?

  3. pharyngeal pouches (become gills) • Tail - extends beyond anus • Most chordates are vertebrates (SUBPHYLUM VERTEBRATA) Chordates have

  4. Chordates that are NOT vertebrates: Sea Squirts or Tunicates

  5. Lancelet

  6. Chordate Anatomy

  7. ---Animals with a backbone or vertebral column (endoskeleton) ----Have spinal cord - dorsal, hollow nerve cord ----Front end of spinal cord develops a brain What is a vertebrate?

  8. Jawless Fish (lamprey, hagfish) • Cartilage Fish (sharks, rays…) • Bony Fish (salmon, catfish, goldfish…) • Amphibians (frogs, salamanders…) • Reptiles (lizards, turtles…) • Birds (sparrows, hawks…) • Mammals (humans, whales, cats..) Vertebrate Classes

  9. * Anything with gills, scales, and fins… • 1st Fish were jawless • Devonian Period - "Age of Fishes“ Fossil of a devonian fish with jaws and armored plates Stethacanthus Tribute Video What are Fish?

  10. Circulation- 1 Atrium and 1 Ventricle Form & Function

  11. Fish have a two chambered heart – blood is passed over the gills where it picks up oxygen

  12. Water passes over GILLS, oxygen is added • Some fish have gill covers – OPERCULUM • Some fish have special organs to serve as lungs (Lungfish) Respiration

  13. Homeostasis: maintaining water balance • Salt water fish tend to lose water • Fresh water fish tend to gain water • *This is why you can’t put a salt water fish in a fresh water tank • *The salmon can do both Excretion

  14. Response- Cerebrum - thinking, voluntary activities- Cerebellum - coordination- Medulla Oblongata - functions of internal organs - Lateral Line System - senses vibrations The Nervous System

  15. Fish fins help stabilize the fish and propel it forward Swim Bladder – maintains buoyancy (like a balloon) Other Fish Adaptations

  16. Spawning – fish lay eggs that are fertilized externally • Some fish bear live young • Oviparous (lays eggs) • Ovoviviparous (eggs stay in mom) • Viviparous (babies get nourishment from mom. Ex. Humans, cats, some fish) Reproduction

  17. Salmon Video at National Geographic

More Related