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9 terms

Characteristics of the 9 Phyla of the Animal Kingdom

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Phylum Porifera
NO TISSUES OR ORGAN SYSTEMS
1. Contain a few specialized cells
2. Asymmetrical
3. Adults are SEssile
4. Tiny pores all over body (ostia)
-central opening osculum
Phylum Cnidaria
1. Soft bodied
2. stinging tentacles
3. radial symmetry
4. Specialized tissues
-2 germ layers
-endo and ecto
Phylum Echinodermata
- spiny skeleton
-internal skeleton
-water vascular system
-radial symmetry
-deuterostome
Phylum Annelida
1. Body divided into segments that are separated by
septa (internal walls)
2. Setae =>bristles attached to each segment
3. True Coelom (true cavity)
Phylum Arthopoda
1.JOINTED APPENDAGES
Greater mobility and locomation
2. Tough exoskeleton => chitin
3. Segmented: 3 head, thorax, abdomen
Phylum Platyhelminthes
1.unsegmented
2. Flattened body
3. Acoelomate
-no coelom between tissues
4. Bilateral symmetry
5. Cephalization
6. Tissues
7. Gastrovascular cavity with pharynx
Phylum Mollusca
1. soft bodied
2. Internal or External shell
3. Free-swimming larva Trochopore
4. Four parts
-foot, mantle, shell, visceral mass
Phylum Chordata
1.notochord
-dorsal, hollow, nerve cord
-post anal tail
-pharyngeal pouches
Phylum Nematoda
1.Slender, unsegmented, tapering ends
2. Free living and Parasitic
3. 3 Germ layers
1. Body cavity: pseudocoelom