Earthworms are large segmented worms that belong come the Phylum Annelida, class Clitellata, and also sub course Oligochaeta. Leeches are also worms belonging come the very same Phylum and also class, but sub course Hirudinae and also are of three types, freshwater, terrestrial and marine. The similarities and also differences between earthworms and leeches room outlined below.


Comparison chart

Earthworm versus Leech comparison graph
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EarthwormLeechClassification Anatomy Feeding and also Nutrition Reproduction Locomotion and Behaviour Benefits BY Structure Asexual Reproduction
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Earthworms are big segmented worms that belong to the Phylum Annelida, course Clitellata, and also sub class Oligochaeta.

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Leeches are also worms belonging come Phylum Annelida, course Clitellata and sub class Hirudinae
Earthworms have actually a segmented (37-100) tube-like muscular body linked by a constant gut, a nerve and also a blood vessel. The human body of a leech is split into 34 segments through a little anterior and large posterior sucker.
Earthworms feed on essential matter uncovered in the floor such as dead pipeline and small soil corpuscle that space digested in the intestine. Some species of leech (hematophagus) feeding on blood. Other species feed ~ above decomposing bodies and also open wounds that amphibians, reptiles, fish and even mammals.
Earthworms are hermaphrodites and also have two pairs of testes surrounded by testes sac, ovaries and ovipores. During copulation sperms are exchanged between two worms and stored. Reproduction takes place after copulation. Leeches are additionally hermaphrodites v both male and female reproductive organs. Reproduction occurs after copulation and also is complied with by cocoon development in i beg your pardon the embryos develop.
Earthworms mostly live in the soil. They relocate by method of contraction and also relaxation of muscles which shorten and lengthen the body and aids in movement. The setae (bristles) top top the segments along the body and also mucus secreted also aid in this movement Leeches are of three types -freshwater, terrestrial and also marine. Leeches relocate with the assist of the anterior and also posterior suckers and also longitudinal muscles along the length of the body.
Earthworms aerate the floor while burrowing, feeding on essential matter and also increase the fertility in the process by including humus to the soil. Fresh earthworm casts are rich in nitrogen, phosphates and potash. Leech therapy (or Hirudotherapy) has actually been supplied in some locations of medicine such as plastic and reconstructive surgical treatment to remove swelling and also congestion in tissues and blood vessels.
Basanta Rijal
Earthworms room thin, elongated & round in structure & white in colour Leeches are flat & quick in framework & black color in colour
Earthworms deserve to regenerate because that asexual reproduction Unlike other Annelids, Leeches only reproduce sexually however can"t regenerate

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A terrestrial leech in a coastal New southern Wales forest.

Differences in Anatomy


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Earthworm

Earthworms have actually a segmented tube-like body associated by a consistent gut, a nerve and also a blood vessel. The number of segments varies in different species from 37 approximately 100 segments. The external body is slimy and also muscular.

The body of a leech is divided into 34 segments. The an initial 6 segments form an anterior dental sucker i m sorry is offered to attach to the body of the host. A big posterior sucker is additionally found in ~ the posterior finish which help in the locomotion the the animal. Indigenous a distance, a leech can resemble a slug.

Differences in Diet

Earthworms feeding on essential matter discovered in the soil such as dead leaves. They additionally ingest little soil corpuscle that are digested in the intestine.

Some species of leech (hematophagus) feeding on blood. Other varieties feed ~ above decomposing bodies and also open wounds the amphibians, reptiles, fish and even mammals. Hematophagus leeches have the right to bite, suck out blood indigenous the host, secreting an aesthetic to an anti-clotting enzyme into the blood. Together a result, leech bites bleed much longer than normal wounds.

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Reproduction the Leech vs Earthworm

Earthworms space hermaphrodites which median that it has both male and female reproductive organs. The worms have actually two pairs of testes surrounding by testes sac, which produce and also store sperms, ovaries and ovipores in segment 13 and also some varieties use spermathecae or internal sacs to store sperms from other worms at the moment of copulation. Other types have spermatophores, externally located where the sperms from various other worms room stored. Throughout copulation sperms space exchanged between two worms and also stored. Reproduction takes location after copulation once the eggs and also sperms (from the 2nd worm) are injected into the cocoon. During this process, the clitellum transforms pinkish red and is responsible because that secreting the cocoon. The sealed cocoon develops a melon-like framework in i beg your pardon the embryos develop. The earthworm takes around a year to grow into its full sixe. Sex structures build 60-90 days after hatching. The average life expectancy of earthworm varies from 2-8 years, garden varieties having a much shorter lifespan then ar varieties. Some varieties of worms reproduce by asexual way or parthenogenesis and form clones.

Leeches are likewise hermaphrodites v both male and also female reproductive organs. Reproduction occurs the same means as in earthworms, except that the sperms are stored in spermatophores, which room sacs outside the body of the leech. Copulation is followed by reproduction and also cocoon formation.

Differences in Locomotion and Behaviour

Earthworms live in the soil and can be usually seen ~ above the surface after a hefty storm. They relocate by method of contraction and relaxation of muscles which shorten and also lengthen the body and also aids in movement. The setae or bristles on the segments along the body and also mucus secreted also aids in this movement.

Leeches lack setae, and also move through the help of the anterior and also posterior suckers and longitudinal muscles along the length of the body. The posterior sucker latches on come the surfaces and while the longitudinal muscle elongate and also move the body of the leech forward, after i m sorry the anterior sucker attaches to the surface and the posterior one is detached.

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Benefits

Earthworms aerate the soil while burrowing, i m sorry is highly beneficial for the soil together it helps in nutrient and also water uptake by the plants. Also, some species of earthworms feeding on organic issue like dead leaves in the soil, and thus assist in boosting its fertility in the procedure by adding humus to the soil. Fresh earthworm casts room rich in nitrogen, phosphates and potash.

Leech therapy (or Hirudotherapy) has been documented in some olden texts. In current years, leeches have actually been supplied in some areas of medication such together plastic and reconstructive surgery to eliminate swelling and also congestion in tissues and blood vessels.