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Worms (excepting the flatworms) are the simplest animals to have a one-way digestive tract (that is, they do not expel waste from the same hole that they eat through). Originally, the animals for whom it is taxonomically correct to call worms were all classified under the single phylum Vermes; later, they were split into three separate phyla: Platyhelminthes (planarians, or flatworms, this being the simplest of the three worm phyla) Nematoda (nematodes, or roundworms) and Annelida(annelids, or segmented worms such as earthworms and leeches; this is the most physiologically complex of the three worm phyla); over time, several new phyla have been developed.
Worms are so separately classified partially because their eating habits and oral anatomy are so diverse. Many, such as earthworms, are decomposers (dirt and debris eaters); earthworms suck food into their bodies and push it down along the body using peristaltic muscular contractions. Other worms, such as leeches and many varieties or roundworm and flatworm, are parasitic. Some species of leeches can bite humans, latching on with their suckers and secreting anticoagulant to keep the blood flowing into the gullet. Roundworms have a digestive system lined with hard cuticle and often ridges; some species (the carnivorous ones) have teeth; others have a stylet that they can poke into other organisms to suck fluids out.
Unlike roundworms and annelids, flatworms do not have a mouth; they absorb nutrients through their skin. However, flatworms are the simplest animals to have a specialized digestive and excretory system.
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∙ 13y ago
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∙ 13y agoIt noms on food with it.
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What do peanut worms eat?
"Peanut worms" are unsegmented marine worms of the invertebrate phylum Sipuncula. They burrow into mud, where they eat any organic matter and detritus they find. They gather food particulars with the tentacles around their mouth, and then draw the food into their body with an "introvert", a segment near their mouth.
What is a multicellular organism that has a mouth and lives in an animal host?
Are you looking for the general name parasite? If not, nematodes and turbellarians are two groups of worms that are often parasitic. A multicellular organism that has a mouth and lives in an animal host is a Helminth.
What kinds of body systems do segmented worms have?
I am in 7th grade and we are learning about segmented worms. i got this information from my textbook. Worms have a tube like body with a bristle like structure called setae. Setae help keep worms in the soil and help them move. Segmented worms also have bilateral symmetry, a body cavity that holds the organs, and two openings -- mouth and an anus.
What causes intestinal worms?
Swallowing the worm eggs causes intestinal worms. Always cook your meat properly to kill any parasites within the flesh. Also, wash your hands before touching your face so you don't get microscopic eggs from dirt into your mouth.
What are the Worms on Flowers?
earth worms are in the flowers
Where are the worms mouth?
its mouth is its bum
If a kitten has worms then puts its mouth to a human mouth can the human get worms?
It's possible.
Were do worms sleep?
worms sleep in your mouth. The y climb in when you are sleeping and they sleep with you.
How do round worms eat?
through their mouth
Do worms have a strong sense of smell?
No, worms do not have a nose,ears,or eyes. They only have a mouth and a butt!
How do worms take in food and get rid of waist?
worms take there food in there mouth and comes out the other end.
How do you eat fire worms?
Stick them in your mouth, chew then swallow.
How do you eat fried worms answers?
Put them in your mouth and chew
Do worms eat caterpillars?
No. You see worms don't have a mouth big enough for a catepillar 3 times it's size.
How silk produced?
it is produced by using the liquid in a silk worms mouth.
What does the mouth do for the worm?
It eats dirt. Worms get all their nutrients from dirt.
What do peanut worms eat?
"Peanut worms" are unsegmented marine worms of the invertebrate phylum Sipuncula. They burrow into mud, where they eat any organic matter and detritus they find. They gather food particulars with the tentacles around their mouth, and then draw the food into their body with an "introvert", a segment near their mouth.
