Bio ch 32 terms.docx 1

Bio ch 32 terms.docx 1 - opposite halves. Bilaterian...

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Anterior Pertaining to the front, or head, of a bilaterally symmetrical animal. Archenteron (ar-ken´-tuh-ron) The endoderm-lined cavity, formed during gastrulation, that develops into the digestive tract of an animal. Arthropod A segmented ecdysozoan with a hard exoskeleton and jointed appendages. Familiar examples include insects, spiders, millipedes, and crabs. bilateral symmetry Body symmetry in which a central longitudinal plane divides the body into two equal but
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Unformatted text preview: opposite halves. Bilaterian (bi-luh-ter-e-uhn) Member of a clade of animals with bilateral symmetry and three germ layers. Blastopore (blas-to-por) In a gastrula, the opening of the archenteronthat typically develops into the anus in deuterostomes and the mouth in protostomes. Blastula (blas-tyu-luh) A hollow ball of cells that marks the end of the cleavage stage during early embryonic...
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