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13.2 Blume Science

QuestionAnswer
What does annelids mean? little rings
What are annelids? tube shaped bodies that are divided into many segments
What are on the bristle like structures called outside of the body? setae
Can setae help the worm move and sense? yes
What kind of symmetry does it have? bilateral
What 2 body openings does it have? a mouth and a anus
Where can annelids live? freshwater & saltwater & moist soil
What are some annelids examples? earthworms & marine worms & leeches
Each body segment has how many pairs of setae? 4
Each body segment has 4 pairs of setae except? the first and the last
A Earthworm has 2 sets of muscles. What are they? one set runs the length and the other set circles the body
Where does the soil enter the worm? its mouth
Where does it go after it enters? the crop which is a sack used for storage
Behind the crop is the ___________? gizzard which is a muscular structure which grinds the soil and the bits of organic material
This grind up matter passes to the ______? intestines where the organic matter is broken down& nutrients are absorbed by blood
After it goes through the intestines it _______? exits the worms anus
Castings _______ the soil? help
Taking in of the soil to get food helps what? provide spaces for air and water to flow through the soil& mix it
Annelids have what kind of circulation? closed
How many blood vessels do they have? 2: one along the top and another along the bottom they meet in front
What are like 5 hearts and pump blood? aortic arches
Smaller vessels go where? into each body segment
What do annelids not have? gills or lungs
Oxygen and carbon d. exchange where? through their skin
Never do what with earthworms? never touch an earthworm with dry hands; never remove thin mucus layer
What size of brain does a earthworm have? small
They respond to what? light&temp&moisture
Earthworms are? hermaphrodites
Earthworms reproduce? it can make both egg and sperm but cant feritlize its own
Created by: sraymond
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