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Cephalochordate

TermDefinition
Common features of chordate Multicellular Bilateral symmetry Deuterostome development Sister phylum to echinoderms
Defining features of Chordates 1. Notochord 2. Hollow dorsal nerve chord - Gives rise to the central nervous system. 3. Pharyngeal slits 4. (Endostyle) 5. Post-anal tail
Skeleton & Locomotion • Cephalochordate myomeres are V (>) shaped. • The notochord and muscles work together to allow locomotion. • Coordinated contraction of muscles allows for side bending, and swimming.
Feeding & Digestive system Suspension feeders, with a one-way digestive system. • Food (with water) enters the pharynx, gets trapped by mucus secreted by the endostyle, moves through the gut, and out the anus. • Water (with food) enters the pharynx, passes through the pharynge
Circulatory & Respiratory Systems Closed circulatory system with blood vessels. • Blood is plasma-like; no pigments or blood cells. • No heart; contractile blood vessels. • Pharyngeal slits are not yest gill slits; not specialized for gas exchange.
Created by: UchihaIrish
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