Step 1
angleworm have been on the planet for more than 80 million years . They prefer warm , damp dirt and usually stay just below the surface . They do to the top only during times of rainfall , when their burrows become saturated . Worms mate when they are forced to rise . Though the have both male and female procreative pipe organ , they reproduce sexually . The pinkish brown swelling on the fishing worm ’s body is cry the clitellum . It plays a role in replication .
Step 2
Annelids
Earthworms are the well - known and most complex of the segmented worm . There are more than 9,000 metal money of segmented dirt ball . They are anticipate annelid worm , from the Latin password ” annelus , ” which means little rings . These rings , or segments , run along the fishing worm ’s body . crawler have the ability to rectify , or regrow , miss section . The typical fishworm has about 150 segments and is several inches long , but a giant earthworm species that endure in Australia grows up to 11 feet long .
Anatomy
Each segment , except the first and last , have four pairs of small bristles yell seta . The setae help the earthworm move through the soil . Despite their size , earthworms possess a complex digestive system . Food spend into two belittled variety meat , where it is ground up , digested and moved into the small intestine . Earthworms have a closed circulatory organisation with five pairs of hearts . They also have a rima oris and a simple wit at the foreland conclusion and an anus at the tail end .
Purpose
coarse dew worm , also called nightcrawlers or angleworm , are beneficial creatures . They improve soil wherever they are present by providing a natural way of aeration . As they move through the basis , they make tunnel . Air and water then pass through these tunnels to the roots of plants . They separate down constituent matter such as leaves and bedding and excrete atomic number 7 - rich waste that fetilizes the stain . They are a favourite food for robins and a favourite bait for fisherman .
Considerations
Earthworms are adapted to living underground . The soil provides them with a source of nutriment . They take in atomic number 8 through their thin skin , which is covered with mucous secretion to facilitate it stay dampish . They are prone to moisture red ink . Though they have no eyes , tiny organs on their head end are tender to light . They also have no ear , but react to vibrations in the soil
References
Related
