How does a worm crawl? Detailed answer

BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Free library / Directory / Big encyclopedia for children and adults

How does a worm crawl? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

Did you know?

How does a worm crawl?

There are many types of worms, but we are most familiar with earthworms. The body of the worm is divided into small circles - segments separated by grooves. Therefore, earthworms belong to the group of annelids. Earthworms are most of the time underground, digging tunnels in its soft upper layer, moving along them and feeding at the same time. They secrete mucus which makes it easier for them to move underground.

Worms dig passages using two groups of muscles. One group of muscles runs around the entire body, one muscle per segment. When the muscles of the segment are tense, the body stretches, lengthens and becomes thinner. The front end of the body moves forward. The second group of muscles is located along the entire body. When these muscles are tensed, the segments are compressed, the body contracts.

An earthworm resembles one tube inside another. The long, segmented body is one tube. Inside it has a long digestive tube through which food enters. This digestive tube is open at both ends. Food enters from one end, and undigested residues exit from the other.

In hard, heavy soil, worms dig tunnels by swallowing the earth. This method of transportation is a way of feeding because the ground contains the remains of dead trees and animals. They are processed, and the soil exits through the digestive tube. This activity of swallowing the earth and returning it back plays an important role in enriching the soil and improving it. Scientists have proved that on each hectare earthworms process annually from 20 to 40 tons of earth annually.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

How do oysters eat?

When you look at an oyster, you involuntarily wonder what else it does, besides just lying in its shell? How does she breathe, eat and how does she protect herself from enemies? An oyster is not just a piece of living matter, but rather a complex creature that performs many vital operations. She has various organs, blood, nervous system and so on. But for now, we'll just look at how the oyster eats.

First, what does she eat? The oyster's diet includes tiny algae and various microorganisms, that is, organisms that can only be seen under a microscope. These little creatures enter the body of the oyster along with water, which constantly "washes" its internal organs when the shell is opened. This food is taken from the water and coated with mucus secreted by glands located in the gills of the oyster. The oyster selects some microorganisms for food and rejects others that are unsuitable for it, or too large, or not in the right shape. But we do not know how she manages to make this choice.

Oysters have a alimentary canal that begins with a mouth opening with four tendrils guarding it. These tendrils take in food and sort the edible from the inedible. The narrow esophagus leads to the stomach, a large sac-like organ. Something like a twig, about a centimeter long, sticks out inside the stomach. This twig, rotating, mixes and grinds small particles of food. It also contains enzymes that digest food.

In addition, a large digestive gland is located around the stomach. In this gland there are blood cells that envelop food and digest it inside their body. Of course, this is very general information about the process of feeding oysters. We have given them just to give you an idea of how oysters are eaten.

Test your knowledge! Did you know...

▪ How tall is a giraffe?

▪ Does techno have anything in common with rock music?

▪ Which fish have males instead of females?

See other articles Section Big encyclopedia. Questions for quiz and self-education.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

Parents smoke - children get sick 04.08.2011

Pediatricians from Heidelberg (Germany), after examining 4236 kindergarteners and the conditions in their families, came to the conclusion that children of smoking parents at the age of four or five years are often prone to hypertension.

In the surveyed families, 29% of fathers smoked, 21% of mothers smoked, and both parents smoked in 12% of families. In 20% of children exposed to tobacco smoke at home, the upper value of blood pressure turned out to be at the limit of the norm, and there is a risk that hypertension will develop in the future. In addition, children in smoking families are more likely to get colds, asthma and inflammation of the middle ear.

By the way, back in 2004, Swedish researchers found that even in cases where parents smoke only on the balcony or on the landing, the blood of children contains twice as much nicotine residues than children from non-smoking families. Obviously, nicotine gets to them through the breath of parents and their clothes.

Other interesting news:

▪ Extreme camcorder Sony Handycam HDR-GWP88 with built-in projector

▪ Lenovo ThinkPad X1

▪ We drown or we don't drown

▪ AudioQuest NightHawk headphones with natural biocellulose cones

▪ Ultra-small mobile phone antenna

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the website Residual current devices. Selection of articles

▪ article by Walter Scott. Famous aphorisms

▪ article What is the probability of winning in Freecell Solitaire? Detailed answer

▪ article Head of the veterinary clinic. Job description

▪ article What is DDX (Direct Digital Amplification)? Encyclopedia of radio electronics and electrical engineering

▪ article Obedient beads. Focus Secret

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews