Why does a spider need a web? Detailed answer

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

Why does a spider need a web? Detailed answer

Big encyclopedia for children and adults

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

Did you know?

Why does a spider need a web?

For many spiders, the web is life. It is both a shelter and a trap for prey. In complex nests made of cobwebs or on hanging nets, the spider lies in wait for the victim, hides itself from enemies, and escapes from bad weather. Young spiders hatched from eggs grow in spider webs; on cobwebs they are carried by the wind across the wide world.

The spider glands of spiders are located on the abdomen. These are highly modified abdominal limbs. Spider warts retained the mobility that was at the legs. This is very important in the manufacture of webs. The abdomen of spiders also became mobile, which is connected to the cephalothorax with a thin stalk.

By rotating and moving the abdomen in different planes, the spider can weave a variety of "patterns". Comb claws appeared on the limbs of the cephalothorax for combing the web. The limbs themselves are also very mobile and well adapted for spinning.

Author: Cellarius E.Yu.

Random interesting fact from the Great Encyclopedia:

How do fish sniff?

It will probably surprise many that fish can sniff things. But like all other organisms, fish sniff with their noses. Fish have two pairs of nostrils. Each nostril has two openings. One in front, the other just behind him. The location of the nostrils on the head can be completely different, depending on the type of fish. The flow of water passes through all the holes. It flows into the front and out through the back. At the same time, water irritates sensitive cells that tell the fish about the smell.

Many fish have a keen sense of smell. They can detect even a faint trace of a substance. Indeed, the sense of touch can be very important for fish when they find their way home. You know that sturgeons return to their original spawning habitats.

How do they do it? Scientists believe that they show their children the way by smell. The researchers trained the sturgeon to distinguish between 14 different types of odors. Some fish can tell the difference between water from two bodies of water. But if their noses are plugged, they cannot do it.

For other experiments, a large group of sturgeon was taken from their native waters. One half got their noses plugged, the other half didn't. Those whose noses didn't work got lost. The second found their way to their pond.

Test your knowledge! Did you know...

▪ How long has craniotomy been practiced?

▪ What is glue made from?

▪ When could architects or musicians win Olympic medals without playing any sport?

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

MEMS microphones from Akustica: a new word in sound processing 13.03.2006

Akustica, which creates "silicon" acoustic components using MEMS technology, has announced the availability of a new product - the AKU2000 single-chip microphone.

The digital signal output device contains a silicon membrane and is well suited for operation in "microphone array" configurations (microphone array) used in cases where a high degree of protection against noise is required. An acoustic transducer, an output amplifier, and a fourth-order sigma-delta modulator are integrated into the crystal. The CMOS process technology is used for manufacturing.

The novelty is designed for surface mounting and should replace the electret condenser microphones (ECM) used for fifty years in millions of portable devices. According to Akustica, its product has a higher noise immunity than EKM.

A huge advantage of using the new microphone compared to existing solutions is the absence of lines through which analog signals are transmitted. This allows designers to position the microphone and other components without worrying about EMC issues.

Samples of the AKU2000 microphone chip can already be ordered for review. The cost of one product in a wholesale lot of 1000 pieces will be $3,87.

Other interesting news:

▪ Self-healing glass

▪ World's smallest Full HD display

▪ Aquarium fish for astronauts

▪ Artificial intelligence controls the tanker

▪ Contraceptives for kangaroos

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ site section Power regulators, thermometers, heat stabilizers. Article selection

▪ article Guidelines for the development of civil defense issues in graduation projects. Basics of safe life

▪ article Why was a newspaper published in which almost all the words were replaced by bla bla bla? Detailed answer

▪ radish article. Legends, cultivation, methods of application

▪ rubber article. Simple recipes and tips

▪ article Warming up the snow. physical experiment

Leave your comment on this article:

All languages of this page

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