How are the oral and anal cavities differentiated in the intact, adult earthworm? The anal cavity develops before the oral cavity. The anal cavity is at a farther distance from the clitellum than is the oral cavity. The anal cavity develops from the mesoderm and the oral cavity develop ectoderm. Both cavities develop at the same time during gastrulation and can not be differentiated in the adult. Both cavities develop at different times from the mesoderm and can not be differentiated in the adult unless it is cut open.

How are the oral and anal cavities differentiated in the intact, adult earthworm? The anal cavity develops before the oral cavity. The anal cavity is at a farther distance from the clitellum than is the oral cavity. The anal cavity develops from the mesoderm and the oral cavity develop ectoderm. Both cavities develop at the same time during gastrulation and can not be differentiated in the adult. Both cavities develop at different times from the mesoderm and can not be differentiated in the adult unless it is cut open.

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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