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Kendahl R.

Blume Ch. 13.2

What is the meaning of Annelids? "Little rings"
What are some attributes of Annelids? They have tube shaped bodies divided into many segments and have setae.
What is a worm's symmetry? Bilateral
How many openings does a worm have? What are they. 2; the mouth and the anus
Where does the soil go after it enters the worm's mouth? The crop "storage sack"
What grinds up the soil? The gizzard
Where does it pass to next? The intestines
Finally, the waste exits through the _____. anus
T or F. This process is horrible for the worm. False
The waste that piles up are called? Castings
How do castings help attribute to the soil? They fertilize the soil.
What is a worms circulatory system? A closed circulatory system
How many blood vessels does a worm have? Where are they located? 2; along the top and along the bottom
What do the aortic arches do? How many of them are there? They pump blood; there are 5 of them.
______ vessels go into each body segment. Smaller
T or F. Worms don't have gills or lungs. True
Where is O2 and CO2 exchanged? Through the worms skin.
What is the texture of a worms skin? It is covered with a watery mucus.
If you touch the worms with dry hands, you could? Suffocate them
Where is the worms brain? In the front segment.
Nerves in each segment join to form the main nerve cord that connects to the _____. Brain
What do worms respond to? Light, temperature, and moisture.
Earthworms are _______. Hermaphrodites
Why are worms like sponges in a way? They can lay eggs and produce sperm, but they can't fertilize their own eggs.
What does it have to do to fertilize? It must receive sperm from another worm.
What is the name of marine worms? Polychaetes
What is the estimation of their species number? About 8000+
What are some things that they do? They float, burrow, build structures, or walk along the ocean floor.
Fun fact about marine worms. Some can produce their own light.
How deep can some marine worms live? 540m
What is one thing that makes marine worms like earthworms? They have body segments.
Their name "Polychaetes" means... Many bristles
What does the "Christmas Tree" do with it's tentacles. It exchanges O2 and CO2 as well as gather food.
Free-Swimming Polychaetes have... a head with eyes, a tail, and parapodia
What are parapodia? These are paired, fleshy outgrowths on each segment that help it move and get food.
Created by: kendahl