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Chordate Characteristics

Chordate Characteristics. Urochordates. Tunicates & Sea Squirts. Cephalochordates Lancelets (Amphioxus). Agnatha Hagfish & Lamprey. Agnatha. - True vertebrae - Gills. Lamprey. Chondrichthyes ( cartilagenous fish). Gnathostomes. 2 chambered heart. Cat Shark Egg Oviparous.

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Chordate Characteristics

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  1. Chordate Characteristics

  2. Urochordates Tunicates & Sea Squirts

  3. Cephalochordates Lancelets (Amphioxus)

  4. Agnatha • Hagfish & Lamprey

  5. Agnatha - True vertebrae - Gills

  6. Lamprey

  7. Chondrichthyes (cartilagenous fish)

  8. Gnathostomes

  9. 2 chambered heart

  10. Cat Shark Egg Oviparous Porbeagle embryo viviparous Dogfish Shark embryos Ovoviviparous

  11. Lateral Line

  12. Osteichthyes

  13. Osteichthyes • Bone in their skeleton • An operculum covering the gill openings • A swimbladder or lungs • True scales • Paired fins • Ammonia excretion

  14. Amphibia Amphibians • 1st tetrapods

  15. Tetrapod • Ectothermic • 3-chambered heart (Double circulation) • Smooth skin, lacks scales (Desiccation if dry) • Cutaneous respiration • Lungs • Excretes urea

  16. Metamorphosis

  17. External Fertilization

  18. Bioindicators

  19. Reptile Characteristics • Ectothermic • Dry skin covered in scales • Most have 2 pairs of short legs & clawed feet • Oviparous reproduction • Internal fertilization – to avoid desiccation of gametes

  20. Eggs amniotic Lungs to breathe 3 or 4 chambered heart No metamorphosis Hibernate & aestivate

  21. Excretory Waste • The excretory waste of the reptiles is uric acid

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