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Lecture 12

Nematodes & Annelids (Lecture 12)

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Department
Biology (Sci)
Course
BIOL 111
Professor
Irene Gregory- Eaves
Semester
Fall

Description
Biology Lecture 12 NematodesAnnelids10122011 95600 PM Prelecture VocabularyCoelom an animal body cavity enclosed by muscular mesoderm and lined with a mesodermal layer called peritoneum that also surrounds the internal organsProtostome one of the two major groups of bilaterians in which the mouth typically forms from the blastopore if present in early development contrast with deuterostome The major protostome groups are the lophotrochozoans and ecdysozoansDeuterostome one of the two major groups of bilaterians in which the mouth forms at the opposite end of the embryo from the blastopore in early development contrast with protostomes Includes the ambulacrarians and chordatesLocomotion movement or the ability to move from one place to another Segmentation division of an animal body into segments Embryonic development formation of digestive tract and body cavities body segmentationDevelopment of a Digestive TractIt enablesspecialization of gut regionssequential food processingcontinuous operationHow a complete digestive tract develops st1 Protostomes 1 is mouthblastopore mouthnew opening anus 2 Deuterostomes 2ns is mouthblastopore anusnew opening mouth
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