Leech Mouth: Fascinating Things You May Not Know About It

Aashita Dhingra
Oct 27, 2023 By Aashita Dhingra
Originally Published on Nov 25, 2021
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Tropical land leech.

Do you want to learn fun facts about a leech and how its mouth works?

The body of a leech is soft, divided, and elastic-looking. This can help the leech lengthen and contract its body.

The body structure of leeches is made up of numerous rings. Both ends of the body of the leech have suckers. The suckers of a leech are used as hypodermic needles. One to four pairs of eyes are seen on a leech. A leech is a parasite that survives by sucking blood from its host.

Leeches can be found in freshwater, marine, or terrestrial habitats. Leeches have gained popularity due to the medicinal properties of some species of leeches that have been discovered in the last few years.

But is this species really beneficial, or is all the news around its benefits a hoax? Keep reading the article to learn about leeches and some interesting facts!

Afterward, also check out the facts about earthworm lifespan, and earthworm reproduction.

Does a leech have a mouth?

A leech (subclass Hirudinea) is one of about 640 species of segmented worms in the phylum Annelida with a small sucker at the front end of the body that contains the mouth and a large sucker at the caudal end. Leeches have 34 body segments in total.

The body length varies from a few millimeters to approximately 7.5 in (19.1 cm ) or even longer when the creature extends. Leeches are mostly found in fresh water and on land. Members of the Rhynchobdellida group can be found in both fresh and saltwater.

Leeches have robust muscular bodies and are bilaterally symmetrical. Many leeches are usually flattened and segmented dorsoventrally (front to back), though the segments are rarely visible. Many leeches are long and wormlike, while others are broad. Many leeches can change shape dramatically between the elongated and contracted states, as well as between the hungry and full states.

When it comes to leech bites, not all leeches are bloodsuckers, but still, they can inflict a wound on the skin, which might lead to bite symptoms. If the bite wound area hurts, get in touch with a doctor for suitable treatment.

How many mouths does a leech have?

Snails, insect larvae, and worms are among the foods eaten by aquatic leeches. Aquatic leeches feed on the blood of fish, amphibians, birds, and mammals, as well as snails, insect larvae, and worms.

Only mammals' blood is consumed by true land leeches. A Y-shaped incision is made within the flesh by three jaws with sharp teeth. The saliva of a leech contains chemicals that numb the wound, widen blood vessels to enhance blood flow, and prevent blood from clotting.

The anticoagulant hirudin is derived from the body tissues of the European medicinal leech (Hirudo medicinalis), while another chemical produced by Amazonian leeches is used to remove current clots.

The Gnathobdellidae family includes many leeches that attack humans. Several kinds of leeches have been used in medicine for centuries in Europe, where the use of leeches to drain blood peaked in the nineteenth century.

Mental sickness, tumors, skin disease, gout, and whooping cough were all common diseases treated with leeches. Applying multiple leeches to each temple of the patient and allowing them to suck blood was a common medical cure for headaches. Leeches have also been utilized to prevent blood clots after specific surgical procedures, such as the reattachment of a severed finger.

Leech therapy may sound like something from the Middle Ages, but it predates the Middle Ages era by a significant amount of time. Leeches were utilized therapeutically in Ancient Egypt and by Indians, Greeks, and Arabs.

The leech treatment was used to cure skin disorders, dental problems, nervous system concerns, inflammation, and more. Many medical experts still utilize leech therapy, commonly known as hirudotherapy.

In the '70s, the leech regained prominence, and leech therapy has been successfully employed after finger reattachment procedures and surgery on the soft tissues of the face. It's also occasionally utilized following microsurgeries like plastic or replacement surgery.

Leeches aid in the restoration of blood flow to areas where it has slowed or halted, preventing tissue necrosis. Did you know that although leeches need to suck blood to survive, not all species of leeches suck blood?

The majority of leech species are not endangered. Only one species has been accorded legislative protection, the therapeutic leech Hirudo medicinalis. This species was once widespread throughout Europe and Western Asia, but it has since become extinct in many parts of its habitat due to overharvesting for medical and research purposes.

Photo of a leech in Malaysian Jungle.

Leech Mouthparts

Leeches are mostly found on the ground. They can be found in the water as well. The four major ecosystems of leeches are freshwater, land environment, terrestrial environment, and marine environment.

Leeches have various traits based on where they live. They thrive on other animals through a segmented parasite system in every location.

In dry conditions, some species burrow into the soil, where they can survive for months, even if the habitat is completely devoid of water. The body is dry and hard, the suckers are undetectable, and the skin is entirely dry in such conditions.

These leeches emerge completely active after only ten minutes of being sprayed with a few droplets of water.

The body of a leech is made up of many ring-like components. Leech bodies are made up of 34 segments in total.

The body of leeches measures 8 in (20.3 cm) in length. When the leech extends, it expands beyond its normal size. At the front end, they have up to four pairs of eyes.

At the front and back ends, leeches have two suckers attached. The anterior sucker is the sucker that is attached to the mouth. The posterior sucker is the sucker that is attached to the tail.

The posterior sucker aids while attached to the host, whereas the anterior sucker aids in the sucking of blood. After draining the blood of the victim, the total volume of the body expands.

Do leeches have teeth?

The North American Medicinal Leech, Macrobdella decora, can be found all across the northern part of the continent. It has three jaws, each with 55 or more teeth.

The jaws of the leech move in a similar way to saw motion. A leech bites in a saw motion to open the wound.

Anticoagulants in the saliva of the leech preserve the blood fluid not just while it is feeding, but also during the months of digesting that precede. Humans are most aware of the anticoagulants because leech bites bleed for hours after the leech has been removed.

In order to remove a leech from a foreign body, you ought to put an object with a sharp edge beneath the leech teeth. This will not allow the leech to drink blood from the bite area and will retract the leech mouthparts.

As soon as the leech bite has been blocked and the sucker removed, throw away the animal as far as possible.

Leeches are known as rare types of foreign bodies in the airway. There have been very rare cases where a leech has entered the body, for example, the case of hemoptysis, which was located in the larynx.

Here at Kidadl, we have carefully created lots of interesting family-friendly facts for everyone to enjoy! If you liked our suggestions for leech mouth then why not take a look at earthworm anatomy, or leech facts.

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Written by Aashita Dhingra

Bachelors in Business Administration

Aashita Dhingra picture

Aashita DhingraBachelors in Business Administration

Based in Lucknow, India, Aashita is a skilled content creator with experience crafting study guides for high school-aged kids. Her education includes a degree in Business Administration from St. Mary's Convent Inter College, which she leverages to bring a unique perspective to her work. Aashita's passion for writing and education is evident in her ability to craft engaging content.

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