What are phagocytes? Detailed answer

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What are phagocytes? Detailed answer

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What are phagocytes?

In our body there are millions of lymph nodes - clusters of cells surrounded by connective tissue and muscle fibers. The cells that form in them are called lymphocytes. They have other names as well. They are called white blood cells. They can also be called leukocytes: from the Greek word "leuros", which means "white". They are also called wandering cells, as they wander throughout the body, floating in colorless dots among red blood cells. They are also called phagocytes, which means "devouring cells": this is because of their ability to swallow and digest foreign bodies.

There are about a thousand times more red cells in our blood than white ones. The number of white blood cells in the blood increases during the process of digestion, after intensive physical education, at elevated body temperature and with various infectious diseases. That is why any complete medical examination includes counting the number of these bodies in the blood.

White blood cells, or phagocytes, perform functions in the circulatory system similar to those performed in human society by police officers, soldiers, janitors, firefighters, and emergency medical workers. As soon as the activity of the circulatory system is disturbed in any way, or a foreign body, substance, or dying cell enters it, the white blood cells are immediately set to work. For example, if a splinter gets under the skin, a whole army of these bodies immediately pounces on it and begins to try to "devour" it. They coat the splinter with the digestive enzymes they secrete to dissolve it. They eat into the tissues of the body around the splinter, somewhat thinning them.

Liquefied in this way tissue cells are called pus. If pus forms around the wound, it means that there is something that our body wants to get rid of. Large collections of pus are called an abscess.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

How do bees communicate?

When a worker bee finds a flower with nectar, how does she communicate it to others? How does she convey to them what kind of flower it is, how far away it is, and in what direction?

The way in which bees communicate this information is one of the most amazing wonders of nature. To begin with, let's say that the language of bees is an instinct. They do not learn it, but simply, having reached a certain age, they automatically master it.

Bee language is the language of smells and dances. When the bee discovers nectar or pollen, it returns home and starts dancing, describing regular circles one after another. The dance draws the attention of other bees and tells them where the nectar or pollen was found. Other bees by the smell of the returnee can find out what she has found.

If the bee dances animatedly, it means that a large amount of food has been found, and many bees fly away to search. Thus, the bee can report several things. From the dance, you can determine whether nectar or pollen has been found. By the smell of the bee itself, you can tell which flower to look for. The slowness of the dance speaks to the quantities of food found.

But all this applies only to flowers located within 100 meters of the hive. When the bee finds the desired plant farther away, when it returns home, it shows a different kind of dance. Instead of describing circles, she moves in a figure eight, connecting two loops with a straight line, while swinging her abdomen from side to side.

In addition to the previous information, this dance tells the bees how far and in which direction to fly. The number of rotations per minute indicates the distance. The farther, the less eights are described. For example, 11 rotations per minute is equivalent to a distance of 2700 m. The line along which the bee walks between the two loops of the eight shows the exact direction. The line is determined by the position of the sun in the sky, so other bees can immediately determine the correct angle!

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