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57 Cards in this Set
- Front
- Back
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What is the most popular worm in the sea?
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Roundworms
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How many species of roundworms have been found?
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10,000 species
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Can roundworms swim?
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yes
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What does the gangila, in the roundworm, connect to?
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It connects to nerves that run threw the body.
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What do the nerves, in the roundworm, do?
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Those nerves control the muscles that make the worm move and respond.
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What phylum are roundworms classified under?
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Nematoda, they are also reffered to as nematodes.
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What type of reproduction do Roundworms have?
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sexual
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Do roundworms have internal development of eggs, or external?
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external!:)
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What do roundworms feed on?
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organic debris
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What type of digestive tract do roundworms have?
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They have a one way digestive tract.
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What is a one way digestive tract?
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it is when food enters the mouth, is digested in the stomach and intestine, and undigested waste passess out through the anus.
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Does the flatworm have a circulatory or respiratory system?
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no
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What phylum are the earthworms classified under?
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Annelida
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How many classes of Annelidas are there?
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There is 3
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What do earthworms feed on?
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Organic matter in sediments
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What is another name for the "earthworm"?
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Segemented worms, or annelida
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Where do sandworms live?
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In muddy sands in the intertidal and subtidal zones.
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What do sandworms do when the tide comes in?
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Sandworms crawl around on the bottom and prey on tiny invertebrates.
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What do sandworms do when the tide moves out?
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They burrow in the sand and scavenge on organic debris.
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How do sandworms carry out their live functions?
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Nereis captures its prey with two sharp hooks located in its mouth.
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What does the sandworm have that can extend to catch prey or bits of seaweed?
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proboscis
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What is the sandworms digestive tract seperated by?
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Coelom
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What class do the snadworms belong to?
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Polychaeta
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What does polychaeta mean?
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it means "many bristles"
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How do sandworms move?
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They wriggle through the wet sand by using their paddle like appendages called parapoduim
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What does each parapodium have?
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Setae which is a hairlike bristle.
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When does movement from the sandworm result?
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When longitandinal and circular muscles located under the worms skin are contracted.
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Eyelike receptors that pick up light stimuli, and touch receptors in the skin that pick up otherexternal stimuli, send impulses to what?
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A ventral nerve cord
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How do sandworms breathe?
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Threw their skin
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What happens because the worms skin is so thin?
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Oxygen diffuses from the surrounding
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How are nutrients and respiratory gases transported?
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Closed-Circulatory system
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What do capillaries do?
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They connect arteries with veins
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What part of the worm, carries out excretion for the annelid?
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The Nephridid
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How does the sandworm reproduce?
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Sexually
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What is the bloodwarm?
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A polychaelte
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What circulatory system does the bloodworm have?
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Open- circulatory system
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What is the open circulatory system?
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In which the blood circulates through the tissue spaces rather than throughblood vessels.
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Bloodwarms develop a different strategy to avoid being eaten...which is?
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They live inside a tube.
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How does the Sabella construct its tube?
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By mixing sand grains with mucus.
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How does the parchment make a tube?
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It secretes a tube formed from a tough fibrous material.
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How does the atlantic tube worm make a tube?
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They secretes a hard tube composed of calcium carbonate, which is comented to the surface of mollusks, rocks, and corals
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What is a example of a segmented worm without bristles?
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leech
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What class is the leech placed in?
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Hirudinea
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How does the leech attach to its host?
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By two suckers, one located at the anterior (front), the other at the posterior (back)
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What does the leech do after its teeth pierce the host's skin?
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It draws blood
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What is the chemical that the leech secretes into it's host?
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hirudin
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What does this chemical do?
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it prevents the host's blood from clotting, which enables the blood to flow freely into the leech.
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What is a tiny, transparent worm called?
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Arrow worm
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What phylum is the arrow worm classified under?
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Chaetognatha
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What does arrow worms prey on?
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They prey on plankton
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What type of digestive tract do the arrow worms have?
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one-way digestive tract
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what do digestive nutrients do inside the arrow worm?
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they diffuse into cells
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Respiratory gases and cellular wastes are exchanged between what?
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arrow worm, and the outside environment
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What type of nervous system does the arrow worm have?
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a simple nervous system
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where is the sensory projections (papillae) located on the arrow worm?
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Located along the surface of the worms body.
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what are arrow worms?
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They are hermaphrodites
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what is the reproduction for the arrow worm?
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Sexual
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