Notochord

Summary of phyla characteristics Where do they live: Marine Terrestrial Fresh What kind of symmetry do the have: bilaterial List 7 classes and give examples of each: Agnatha – hagfish Chondrichthyes - sharks, skates, rays Osteichthyes – bony fish Amphibia – frogs, toads, salamanders Reptilia – snakes, lizards, turtles Aves – birds Mammalia – bats and humans

Body plan: 4 characteristics Bilateral symmetry Endoskeleton made either of cartilage or bone 4 characteristics of all chordates: Single, dorsal nerve cord A dorsal rod of cartilage called a notochord Pharyngeal gill slits A post anal tail

How does it reproduce: Sexual reproduction Internal fertilization Subphylum urochordata: hermaphrodite

How does it get nutrients: Subphylum urochordata – filter feed Subphylum cephlachordates – predation Subphylum vertebrata – predation

Important Vocabulary: Notochord – a dorsal rod made of cartilage or bone Oviparous – egg laying mammals Ovoviparous – egg hatched inside female body and live births Viviparous – placental animals with live births. Ectothermic – internal body temperature relative to outside temperature. Endothermic – regulate internal body temperature; remains relatively constant.