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BIOL212

Majors animal: Anatomy of Hydra

StructureFunction
Tentacles Defense and prey capture
Mouth Ingestion of food and elimination of indigestible particles (egestion)
Hypostome Elevated mound of tissue that expands or contracts to regulate size of mouth opening
Cnidocytes Specialized stinging cells located in the epidermal layer of the tentacles and body wall
Gastrovascular cavity Chamber within which extracellular digestion of prey occurs; only opening is through the mouth
Bud Product of asexual reproduction; will fall off when mature and become a self-sufficient organism
Gonads Organs for sexual reproduction; Hydra are dioecious, meaning than an organism has either testes or ovaries, but not both
Basal disc Specialized region for attachment to substrate
Epidermis Outer tissue layer; specialized for protection
Gastrodermis Inner tissue layer; specialized for digestion
Mesoglea Inert, acellular, jellylike substance that aids in supporting the body
Created by: scandalouscanine
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