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Scheduled maintenance: October 22, 2023 from 04:00 AM to 05:00 AM Start studying Cross section through amphioxus oral hood (cephalochordata). PLAY. Learn vocabulary, terms, and more with flashcards, games, and other study tools Cephalochordata. 14 terms. The roof of the oral hood in Amphioxus shows the presence of a unique structure. 5 B) Cephalochordate, Amphioxus Enlargement of Oral and Pharyngeal regions. Study with Quizlet and memorize flashcards containing terms like rostrum, oral hood, velar tentacles and more. Start studying Cephalochordate amphioxus (oral hood) (cross section). Start studying Protochordates (Lab 1) - Amphioxus. Learn vocabulary, terms and more with flashcards, Top creator on Quizlet Oral Disease and Prevention - practice test. Start studying Practical #3 - Cephalochordata (Amphioxus) Anatomy. Study with Quizlet and memorize flashcards containing terms like Pharynx, Endostyle, Notochord and more. Phylum. 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