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Caroline Harper

Blume ch.13.2

What shape are annelids? tube shaped bodies that are divided into many segments
What kind of symmetry do Segmented worms have? bilateral
What holds the two organs? Body cavity
What are the two openings? mouth & anus
Where can segmented worms live? freshwater, salt water, & moist soil
Where does it take the soil in? it's mouth
What is the crop? sac used for storage
What is a gizzard? a muscular structure which grinds the soil and the bits of organic mater.
Where is the organic matter broken down & nutrients are absorbed by the blood? Intestines
Where does the waste leave the worm? Anus
What helps fertilize the soil? casting
What does taking in of soil to get food helps provide? spaces for air and water to flow through the soil and mix the soil
How many blood vessels do the worms have? 2
Where are the two blood vessels located? one along the top and one along the bottom
What pumps the blood? 5 heart-like “aortic arches”
Where does oxygen and carbon dioxide exchange through? Their skin.
What is the skin covered with? Thin, watery mucus
What do these worms not have? gills or lungs
WHere is their brain located? In the front segment
What do the nerves respond to? light, temperature, and moisture
What are earthworms? hermaphrodites
What can it not do? fertilize its own eggs
What can it make? both sperms and eggs
What must the earthworm do to reproduce? receive sperm from another earthworm
Marine worms are what? Polychaetes
How do marine worms move? float, burrow, build structures, or walk along the ocean floor
What can some marine worms do? Produce their own light
What do marine worms have? Segments
What does polychaete mean? "many bristles"
What do free-swimming polychaetes have? head with eyes, a tail and parapodia
What are leeches? segmented worms
What do leeches feed on? Blood of other animals
What do leeches have at the end of their body? A sucker
Created by: andreaharper