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BIOL212

Majors animal: Anatomy of Metridium (matching)

StructureFunction
Tentacles Defense and prey capture
Mouth Ingestion of food and elimination of indigestible particles (egestion)
Oral disc Raised portion of the mouth (equivalent to the hypostome of hydrozoans)
Gonads Organs for sexual reproduction; gametes are released into the gastric pouches and exit the body through the mouth
Ostium Pore that allows circulation of fluids between adjacent body sections
Pharynx Muscular portion of the gastrovascular cavity for pulling prey inward and expelling indigestible particles
Retractor muscles Expand or contract the body
Gastrovascular cavity Specialized chamber for extracellular digestion of prey
Primary septum One of six thin, vertical walls that divides body into sections, providing support and increased surface area for digestion
Secondary septum One of several thin, incomplete vertical walls that further subdivides the body, producing support and increased surface area for digestion
Pedal disc Tough, fleshy base that attaches organisms to rocks or sandy ocean floor; most anemones can use their pedal discs to move slowly, gliding along the ocean floor
Acontia Contain cnidocytes and may be extended through the mouth to aid in subduing live prey or to provide additional defense against predators
Created by: scandalouscanine
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