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Bio ch 32 terms.docx 7

Bio ch 32 terms.docx 7 - protostomes in which the planes of...

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parallel or perpendicular to the vertical axis of the embryo, thereby aligning tiers of cells one above the other. radial symmetry Symmetry in which the body is shaped like a pie or barrel (lacking a left side and a right side) and can be divided into mirror-imaged halves by any plane through its central axis. spiral cleavage A type of embryonic development in
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Unformatted text preview: protostomes in which the planes of cell division that transform the zygote into a ball of cells are diagonal to the vertical axis of the embryo. As a result, the cells of each tier sit in the grooves between cells of adjacent tiers. Triploblastic Possessing three germ layers: the endoderm, mesoderm, and ectoderm. Most eumetazoans are triploblastic....
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