lab quiz 2

lab quiz 2 - Kingdom Animalia Phylum Porifera o Sponges no...

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Kingdom Animalia Phylum Porifera o Sponges no digestive tract Outer layer – made of flattened cells with numerous pores Center Gelatinous Layer - mobile. Move by Pseudopods. Pick up food vacuoles and digest the food and carry nutrients. Also carries oxygen to dispose of waste products Center layer Skeletal Cells - Spongin is a flexible protein, crystalline, calcareous or siliceous spicules in a large variety of geometric forms Inner most Layer – made of only choanocyes. Have a central flagellum surrounded by a collar of microvilli. o Only animal without true tissues o Divide on material used in “Skeleton” Class Calcarea Calcium spicules o EX- grantia Class Hexactinella Glass spicules Spicules are 6 pointed Class Demospongiae Bath sponge Protein spicules Brightly colored Phylum Cnidaria o Swimming (medusa) o Polyp stage
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o Have one opening to the digestive tract. Digestion is both extracellular and intracellular Class Hydrozoa Hydra, Portuguese man of war Spend most of their lives as (mini palm tree) a polyp stage (bottom dweller) Man-of-war has nematocysts to harpoon prey Hydra- has no medusa stage (no jellyfish) Class Scyphozoa
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lab quiz 2 - Kingdom Animalia Phylum Porifera o Sponges no...

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