Protostomes - PowerPoint PPT Presentation

The Protostomes

The Protostomes. Mollusca, Annelida, Arthropoda. Radiata. Bilateria. Eumetazoa. Parazoa no true tissues. Multicellularity. Protostomes “mouth first”. Deuterostomes “mouth second”. Common Features. Distinguishing features. Mollusk Body plan. muscular foot mantle

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Kingdom Animalia

What are animals? Animals eat to live: ‘ingestively’ heterotrophic Multicellular lack a cell wall. Kingdom Animalia. Sponges are the oldest known animals in the fossil record and are similar to protistan choanoflagellates. Origins and Early Diversification of Animals. Sponge (an animal).

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Gastrulation is the first stage in forming the body plan

Gastrulation is the first stage in forming the body plan. Gastrulation occurs by movement of cells from the exterior of the blastula to the interior. Forms the 3 germ layers Movement occurs through a region called the blastopore.

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