BLG 144 Chapter Notes - Chapter 34: Symbolic Speech, Paranthropus, Homo Sapiens
27 Dec 2017
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Deuterostome animals bilaterally symmetric (2 pathways to get a coelom) (deuterostome mouth second anus to mouth) Sea stars and sea urchins, acorn worms, includes the vertebrates, single genus with two wormlike species (no brain no gut). Includes blue whale (largest) dolphins, crocodiles, elephants, dinosaurs. Blue whale has a heart the size of 3-4 humans. Can have multiple arms. (sea urchins and sand dollars) the gazelles of the sea. They eat algae and eat off the bottom. Body plan bilateral larvae; adults have five-sided symmetry. Spiny skinned marine animals with secreted endoskeleton made of caco3 plates. Echinoderms have a water vascular system this allows them to move. Take water through the centre (valve) and release the water when moving. Ophuroidea brittle stars five or more long arms, suspension feeders. Echinoidea sea urchins, sand dollars marine harbivores. Use teeth to scrape or to remove kelp holdfasts. Holothuroidea sea cucumbers sausages of the sea. Who are the chordates they feed us.
