animals - deuterostomes
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Animals - Deuterostomes. Chapter 30. Characteristics. Similarities in embryonic development: Radial cleavage Indeterminate cleavage Blastopore becomes the anus Pharyngeal slits . Echinoderms: Spiny-skinned animals. - PowerPoint PPT PresentationTRANSCRIPT
Animals - Deuterostomes
Chapter 30
Characteristics
Similarities in embryonic development:
Radial cleavage Indeterminate cleavage Blastopore becomes the anus Pharyngeal slits
Echinoderms: Spiny-skinned animals
Sea lilies, feather stars, sea stars, brittle stars, sea urchins, sand dollars, sea cucumbers, sea daisies
Endoskeleton covered by a thin epidermis
Water vascular system Radial symmetry All are marine
Chordates
Tunicates, Lancelets, and vertebrates
Four characteristics:1. Notochord2. Dorsal tubular nerve cord3. Pharyngeal slits4. Postanal tail
Agnatha – lampreys & hagfish
Cartilagenous fish – Sharks, skates, & rays
Bony Fish – most fish are in this group
Frogs – have smoother skin than Toads
Salamanders & Newts
Caecilian
Modern Reptiles
Birds
Along came mammals: Monotremes lay eggs
Marsupials: Pouched Mammals
Placental Mammals