Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Kingdom Animalia Phylum Annelida (segmented worms) https://www.youtube.com/watch?v=9Q9gh1k99rY Main Characteristics segmented worms true coelom (body cavity) Annelids Include: earthworms marine worms leeches This is a scale worm (Polychaetes). They live 1000 meters below the water’s surface and can turn their mouths inside out. Other Traits - Annelida means “little rings” - body segments separated by septum = internal wall -some have bristles called setae -have closed circulatory system -have well-developed nervous system (brain) - sexual reproduction in annelids - some are hermaphrodites Class Oligochaeta – Earthworm • Streamlined bodies for moving through soil • Few setae, allows for gripping soil • Live in soil or fresh water • As earthworms pass food & soil through intestines, nutrients are absorbed and indigestible matter passes out through anus as castings • Castings - enrich soil, earthworms aerate soil (worm poop) https://www.youtube.com/watch?v=ZG4e3uik9uw Class Hirudinea -Leeches -external parasites with suckers on each end - suck blood & body fluids from host -most live in moist tropical habitats -medicinal uses (circulation, anti-clotting) Leeches being bred for medical uses. What would you do to cure a swollen foot? https://www.youtube.com/wat ch?v=XtpERpBDJtU Class Polychaeta Marine worms -includes: sandworms, bloodworms, fireworms -have paired paddle-like appendages with setae Nereis Featherduster Fireworm https://www.youtube.com/wat ch?v=cdr1kWmSiiE Recap: Taxonomy Kingdom Animalia Phylum Annelida Class Oligochaeta (earthworms) Class Hirudinea (leeches) Class Polychaeta (marine worms) *All are segmented, and have a coelom