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Polychaete Worms (pol-i-keet) - ppt video online download

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Description

Classification Kingdom Animalia Phylum Annelida (segmented worms) Class Polychaeta 5000 species Nearly all marine
Polychaete Worms (pol-i-keet)
Class Polychaeta species. Nearly all marine.
partitions) Organs. Systems. Digestive. Circulatory. Nervous.
Repeated identical body segments. Parapodia. Paired paddle-shaped appendages. Setae move parapodia and are connected to muscles.
chemical, tactile. Peristomium. Mouth. Contains the proboscis. Folded structure that can extend from body with muscles. Holds jaws that move with body’s fluid pressure.
Herbivores. Habitat. Rocky intertidal. Burrow into mud and sand flats.
1/5 of body length. Has 4 short antennae. Each with a poison gland. Sense changes in water pressure. Can be as large as 20 in. Makes nest of galleries (burrows)
Opens its mouth to pass sand through it’s digestive system. Removes organic matter (nutrients) Creates a fecal mound (caste)