Know about the number of hearts An Earthworm contains and interesting facts about a Worm’s Heart Anatomy and its biology.
As a human have you ever thought of life in someone else’s shoes? Ever wondered how is it to live a life completely devoid of the pleasures you have? Obviously you mustn’t have given it a thought about what is it like to be a worm?
To survive in a world where you do not how the world looks, sounds, and feels is beyond explanation. Earthworms live at ground level or below, and cannot control body temperature or shiver when cold. To add up to the plighting story, they have no arms or legs to move about.
Today we take to see how a worm does things, how many hearts it carries and it’s biology. Continue reading to know more..
1 An Earthworm May Have Up To 5 Hearts
Worms possess a complex circulatory system and mostly have two to 5 hearts. Technically, they are single-chambered aortic arches that are working as hearts in Earthworm’s body. Their function is to simply pump blood throughout it’s circulatory system.
2 But why so many?
Worms, like any other creature need to distribute the blood throughout the body. Many species can reach 3 meters in length, like the giant Megascolides australis, found in Australia. It is for this reason that the worms need a large number of hearts in their system.
3 What is the setup of a worm’s circulatory system?
A worm has two main blood vessels that run throughout the length of the animal’s body. One of the vessels is the ventral artery and the other is the dorsal vessel.
4 What functions do the ventral artery and the dorsal vessel serves?
Ventral artery (where the blood circulates from front to back) makes sure that blood passes oxygen to the organs, while the dorsal vessel (where the blood circulates from the back to the front) brings the blood back. Both parts are attached to all pairs of hearts, and are shaped like a bow.
An animal farmer named Afrânio Augusto Guimarães owns a company specialized in earthworm breeding. He says that the dorsal vessel and ventral artery are dilated and contractile pockets that propel the bloodstream through the body. B
5 What in the worms anatomy makes it a wonder?
Worms have a complex system with many hearts. But on the other hand, they have no lungs. In reality, the organ serves no special purpose. The earthworms breathe through the skin.
6 Any other fact to kick curiosity?
The best-known anatomical curiosity is of worms being hermaphrodites. Hermaphrodites have reproductive organs of both sexes. It is to be noted that the worm does not self-mate but needs a partner to reproduce.
7 What functions do the circulatory system of a worm serve?
The worms have a closed circulatory system, and it presents numerous hearts. The system serves as the passage to transport nutrients, respiratory gases, hormones, as well as the removal of excretions, defense of the organism and distribution of metabolic heat. The heart is always ventral but has variable numbers of cavities and vessels attached to it. Blood reaches the atria by veins, and pass through the ventricles to leave the heart through arteries, branching into arterioles and capillaries. These meet in venules, which converge until forming the great veins and from there to the heart again.
8 How do worms see?
Earthworms are the creatures with no eyes. They have light receptors that help them distinguish between dark and light.
9 How do worms hear?
Earthworms have sensing abilities and can sense the vibrations of animals moving nearby. However, they have no ears.
10 Put some light on the thinking and feeling ability of worms.
Worms have their brain connected to nerves from their skin and muscles. Not only this, their nerves have the ability to detect light, vibrations, and tastes. The muscle movements are a part of the response system.
11 How do worms breathe?
Worms do not have lungs but they take in and carbon dioxide out, just like us. They certainly can’t breathe through their mouth or nose, as they don’t even have one. All the breathing activity takes place through their skin.
12 How do worms eat?
Worms have no teeth, but have a muscular and strong mouth. Such is the strength of their mouth that these night crawlers can even pull leaves into their burrows using their strong mouths. The worm’s stomach is muscular, so is called a gizzard. It grinds up the food, which then moves into the intestine. The intestine, which extends over two-thirds of the worm’s body length, breaks down into usable chemicals.
The chemicals are absorbed into the bloodstream. Leftover soil particles and undigested organic matter pass out of the worm through the rectum and anus in the form of castings, or worm poop. Worm poop is dark, moist, soil-colored, and very rich in nutrients. That’s why farmers and gardeners like to have lots of worms in their soil.
13 Tell about blood cleaning in worms.
Unlike humans, worms do not have kidneys. They have nephridia to filter out the dead cells and other wastes. Wastes from the nephridia are eliminated through the rectum and anus. Also, worm urine is more dilute than ours, and has ammonia as well as urea.