Learn about the comparison between Aurela and Urticina. Comparison # Aurelia: 1. Aurelia is elongated tube-like body with narrow proximal end differentiated into stalk for attachment. 2. Aurelia is about 1.5 cm in height. 3. Distal tentacle: 16 solid tentacles developed in regular order (4 per-radial, 4 inter-radial and 8 ad-radial tentacles). 4. Manubrium is […]
Comparison between Aurela and Urticina | Phylum Cnidaria
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12 Main Features of Phylum Placozoa | Metazoans
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The following points highlight the twelve main features of Phylum Placozoa. 1. Phylum Placozoa are minute, shapeless, multicellular mobile flattend animals. 2. 2-3 mm in diameter. 3. Body of Phylum Placozoa is composed of two outer layers with monociliated epithelial cells. 4. Epithelial cells lack a basal lamina. 5. An inner layer containing loose contractile […]
Canal Systems Encountered in Different Sponges
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The following points highlight the three main types of canal system encountered in sponges. The types are: 1. Ascon Type 2. Sycon Type 3. Leucon Type and 4. Rhagon Type. 1. Asconoid Type: The asconoid type of canal system is regarded to be the most simple and primitive grade of canal system. Asconoid type is […]
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