Required to Know Animal Phylum for Exam 3
- University of Oklahoma
- Zoology 1134
- Required to Know Animal Phylum for Exam 3
Last Modified: 2011-06-23
Lack true tissue
Have choanocytes (collar cells -- flagellated cells that ingest bacteria and tiny food particles)
Hydras, jellies, sea anemones, corals
Unique stinging structure (Cnidae)
Each housed in a specialized cell (cnidocyte)
Gastrovascular cavity (digestive compartment with a single opening)
Gastrovascular cavity or no digestive tract
Clams, snails, squids
Coelomate with three main body parts (muscular foot, visceral mass, and mantle)
Most have hard shell made of calcium carbonate
Coelomate with segmented body wall and internal organs (except digestive tract, wh/ is unsegmented)
unsegmented pseudocoelomate with tapered ends
No circulatory system
Coelomates with segmented body, jointed appendages, and exoskeleton made of protein and chitin
Sea stars, sea urchins
Coelomates with bilaterally symmetrical larvae and five body organization as adults
Unique water vascular system
Lancelets, tunicates, vertebrates
Coelomates with notochords; dorsal, hollow nerve cord, pharyngeal slits, pose anal tail
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