assignment about worms
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assignment on earthworm....
Earthworms are found in wet soil containing rich organic matter. During rainy season, they come out and can be seen easily in lawns, fields and gardens. Life of certain species of earthworm is 4 to 8 years. These nocturnal worms have the following habits.
Earthworms are detrivorous. The food is digested in the gut and undigested food matter along with the soil is passed out through the anus in the form of little heaps of pellets, known as “worm castings”. Earthworms live in burrows secreted by the cutaneous glands.
The animals which live in burrows are called fossorial animals. When the burrows are filled with water, the earthworms come out of their burrows in large numbers and start moving on the soil.
The earthworm does not have specialized locomotory organs. The locomotion is brought about by the circular and longitudinal muscles of the body wall, aided by the chitinous curved setae embedded in the skin. Earthworms move at the rate of about 15 cm per minute.
Earthworms are found in wet soil containing rich organic matter. During rainy season, they come out and can be seen easily in lawns, fields and gardens. Life of certain species of earthworm is 4 to 8 years. These nocturnal worms have the following habits.
Earthworms are detrivorous. The food is digested in the gut and undigested food matter along with the soil is passed out through the anus in the form of little heaps of pellets, known as “worm castings”. Earthworms live in burrows secreted by the cutaneous glands.
The animals which live in burrows are called fossorial animals. When the burrows are filled with water, the earthworms come out of their burrows in large numbers and start moving on the soil.
The earthworm does not have specialized locomotory organs. The locomotion is brought about by the circular and longitudinal muscles of the body wall, aided by the chitinous curved setae embedded in the skin. Earthworms move at the rate of about 15 cm per minute.
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