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25 Cards in this Set
- Front
- Back
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Invertebrate phyla
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Porifera
Cnidaria Platyhelminthes Nematoda Rotifera |
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Porifera
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Ex: Sponges
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Uses of Sponges
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1. clean the water and recycle nutrients
2.used with bathing 3.may prevent some fungi & bacteria |
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Sponges' Feeding
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•Obtain energy and food by pumping water through their bodies
•Food is taken into special cells called collar cells and is digested •Collar cells have flagella for keeping water flowing through the sponge |
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Spicules
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Tiny needle like silicon dioxide or calcium carbonate structures
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Spongin
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•Networks of protein fibers that make up the sponge's simple skeleton
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Porifera(meaning)
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•Pore Bearers
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Porifera characteristics
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1.Sessile
2.No specialized tissues or organ systems 3.Asymmetrical 4.Filter feeders |
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Cnidaria
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Ex: corals, hydra, sea anemones, jellyfish
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Cnidaria characteristics
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1.Motile
2.Have Cnidocytes 3.Mostly Marine 4.Two basic body plans 5.Predators 6.Reproduce sexually & Asexually |
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Cnidocytes
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Stinging cells in Cnidaria
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Nematocysts
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Poisonous barbs in cnidocytes
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Platyhelminthes
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Ex: unsegmented flatworms
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Platyhelminthes characteristics
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•Made up of unsegmented flatworms
•harmless decomposers •harmful parasites |
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Cephalization
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•Sense of organs and nerve concentration in a head region
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Platyhelminthes Classes
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1.Turbellaria
2.Trematoda 3.Cestoda |
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Turbellaria
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•Found in Oceans, lakes, ponds, moist land areas
•Feed on dead organic matter or smaller organisms •Ex: Dugesia (planarians) |
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Trematoda
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•Common name is Fluke
•Ex: Schstosoma (Blood fluke) |
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Cestoda
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•Common name is Tapeworm
•Parasitic worms that live in the intestines •Made up of Scolex & many Proglottids |
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Scolex
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•Knob-shaped head with hooks, suckers or both used for attachment to host
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Proglottids
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•Body segments
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Nematoda
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Ex: roundworms
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Nematoda characteristics
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•Cylindrical
•Bilaterally Symmetrical •One way digestive tract |
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Rotifera
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Ex: Rotifers
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Rotifers characteristics
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•Transport ; free-swimming
•90% live in freshwater •Microscopic •Parthenogenic |
