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20 Cards in this Set
- Front
- Back
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Earthworm |
Reddish brown terrestrial invertebrate |
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Earthworms habitat |
Upper layer of moist soil |
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Earthworms habitat during the day |
Live in burrows made by boring and swallowing soil |
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How are earthworms traced? |
By their faecal deposits |
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What are faecal deposits of earthworms known as |
Worm castings |
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List the 2 common Indian earthworms |
Pheretima and lumbricus |
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Describe earthworms body |
Long cylindrical body |
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Body is divided into how many short segments called metameres? |
100-120 |
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What does dorsal and ventral mean |
Top and bottom view |
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What is marked on the dorsal surface of the body? |
A dark median mid dorsal line called dorsal blood vessel along the longitudinal axis of the body. |
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The central surface consists of what? |
Genital openings |
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What does the anterior end of the earthworm consist? |
Mouth and a prostomium |
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What is prostomium? |
1.A lobe which serves as a covering for mouth 2.A wedge to force open cracks in the soil into which earthworm may crawl |
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What's the function of prostomium? |
Sensory in function |
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What is the 1st body segment called? |
Peristomium(buccal segment) |
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What does the peristomium contain? |
A mouth |
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How are the segments of 14-16 of a matured worm covered? |
By prominent dark band of glandular tissue called clitellum |
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What are the 3 regions body is divisible into? |
1. Preclitellar 2. Clitellar 3. Postclitellar |
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What are spermathecal apertures? |
Genital openings |
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What are found on the 5th-9the segments? |
4 pairs of the spermathecal apertures are situated on ventrolateral side of interaegmental grooves |
