Earthworms belong to the category of invertebrate animals with more than 4000 species worldwide. The scientific name of the earthworm is “Lumbricina”. The natural habitat of earthworm includes tropical forests, mountains, grassland except the region with extreme temperatures like deserts and Antarctica. Earthworms are basically tube-sized creatures which are found in fresh moist soil of different types.
Earthworms might look very small creatures (6 to 7 cm long) but actually they do multiple things eat, breathe, reproduce and help plants to grow by providing them nutrient rich source. Actually, they eat lot of organic materials like decaying plants and animals.
Ten Lines on Earthworm
1) Earthworms can be further classified in to two groups big worms (megadriles) and small worms (microdriles) with varying size and weight.
2) Length of fully grown earthworm can be 0.39 inches however there are earthworms with 14 inches in Southeast Asia (tropical region).
3) Average weight of the earthworm can be in the range of 0.5-1 pound.
4) Lifespan of average earthworm is 4 years. However they can survive up to 8 years in ideal condition meaning no predators and favourable soil condition (not too dry and not too wet).
5) Although majority of the earthworms are hermaphrodites, but they basically need partner to reproduce. The number of fertilized eggs produced by the earthworm could be around 80 in a year.
6) The baby earthworms could take almost 55 weeks to be a fully grown up adult.
7) Earthworms remain underground for most of the period and they create and build complex networks in soil that enhances its fertility.
8) There are many predators of earthworm including toads, frogs, snakes, birds etc. Even humans too eat earthworms in some part of the world.
9) Fossils of the earthworms in the mountains prove the fact that their evolution might have happened 580 million years ago.
10) Earthworms can generally double its numbers in very quick span of time in given area.
1) Earthworms have very typical features like they don’t have any respiratory organ and can breathe through skin.
2) Earthworms have the ability to regenerate the injured parts of the body.
3) An adult earthworm can have 4 to 5 hearts.
4) Earthworms can form tunnel and dig up to 7 feet under the surface of soil which prevents the soil erosion.
5) Colour of the earthworms may vary from species to species. Most of the species of earthworms across the globe are reddish brown or grey in colour.
6) Exposure of too much of heat and light might kill the earthworm.
7) Among the many predators of the earthworms mole is its biggest threat as mole can eat 40 earthworms in a day.
8) Earthworms unlike other species can eat soil and can bring about 7 kg of soil to the surface each year which in turn helps plants to grow.
9) Many farmers across the globe use insecticides and pesticides which has potential to kill earthworms in large numbers.
10) Megadriles crawl at a greater speed compared to smaller worms by taking longer strides and with better muscular contractions.
Set - 3
1) An earthworm is a soil organism that has great ecological importance.
2) It is almost found in the soil of every region in the world.
3) There are more than 2000 species of earthworms on this earth.
4) Earthworms are of red, grey, and brown color depending upon their species.
5) It has a hydrostatic skeleton instead of a true skeleton in its body.
6) It has a hermaphrodite reproductive structure with both male and female genitals.
7) Earthworm feeds on the organic matter present in the soil.
8) The young ones of an earthworm develop directly without undergoing a larval stage.
9) The average lifespan of an earthworm is 2-8 years according to their species.
10) Earthworms move by crawling that is caused by its muscular contraction.
Set - 4
1) An earthworm is an invertebrate creature that belongs to the phylum Annelida.
2) It respires through its skin that needs to remain moist.
3) A newly born earthworm has all structures fully developed except the reproductive structure.
4) The reproductive structure in an earthworm develops in 2-3 months after birth.
5) The excretory organ in earthworm is nephridia as kidneys in human beings.
6) The earthworm has a tube-like body divided in true segments.
7) Amynthas mekongianus having a body length of about 3m is stated as the longest species of earthworm.
8) Earthworms have photosensitive cells called 'Light cells of Hess' instead of eyes.
9) It has the capability of regeneration for their lost or damaged segments.
10) Earthworms are called farmers friends because they improve soil fertility by decomposing the organic matter in the soil.
After going through the above facts and figures about earthworms, one can easily say that they are the most beneficial creatures of the planet earth. Earthworms have got many biological, chemical as well as physical benefits.
The physical creation of a complex network below the ground, chemical digestion of organic materials can provide a lot of nutritional values to the fertile agricultural land. Earthworms also play a very important role in the economy. They are traded all across the globe for various reasons like food for human consumption, decomposing the waste useful in farming, etc.