Chapter 29 Chordates

Deuterostomes

anus forms first

Water vascular system

Fluid filled canals for movement in echinoderms

Notochord

flexible rod supporting the body

Dorsal nerve cord

hollow nerve cord above notochhord

post anal tail

tail extending past the anus

Pharyngeal slits

opening for feeding or gas exchange

amniotes

vertebrates with an amniotic egg (reptiles birds and mammals)

Gnathostome

vertebrates with jaws

lateral line system

sense organ detecting water vibrations

Oviparous

lays eggs outside body

ovoviparous

eggs hatch inside the parent

viviparous

young develop inside and are born live

ectothermic

body heatfrom enviorment

endothermic

body heat from metabolism

amniotic egg

egg with membrane for land development

fish

aquatic vertebrates with gills

Osteichthyans

Bony fish and their decendants

Tetrapod

4 limbed vertebrate

Pedomorphosis

retaining juvenile traits into adulthood

anthropoids

monkeys apes and humans

hominins

human lineage after splitting from chimp ancestors