What are cells? Detailed answer

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What are cells? Detailed answer

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What are cells?

Did you know that you have seen cells many times? If you break an orange slice, then the fibers that we see there are the cells. If you break the shell of the cell, then juice will flow from there.

Scientists believe that the cell is the building material that makes up all living things. There are living organisms consisting of one or two cells. Cells are also systems in which all life processes take place. Each cell of a plant or animal lives its own life and at the same time enables all living beings to carry out their vital activity.

Living cells, both plant and animal, are composed of a cell membrane, a jelly-like colorless substance called protoplasm, and a grain-like portion of protoplasm called the nucleus. It is protoplasm that is living matter.

Protoplasm, no doubt, can be considered the most complex chemical substance. All vital processes take place in it. It absorbs food and oxygen, converts part of the food into living matter, throws out waste, restores worn parts and reproduces.

Every cell needs oxygen and food. It needs energy to do its job. In order to provide every cell with everything necessary, higher living beings have a circulatory system that carries food and oxygen through the cells, and also removes waste.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

What is a dam?

A dam is a barrier that holds back or controls the flow of water. The dam creates reservoirs where water is stored and then used as needed. Dams help people conserve and use water and land resources. A dam built in the right place helps to prevent floods.

The water accumulated behind the dams is a source of water for domestic needs and drinking. Dams supply water to fields for irrigation. Many of them have built power plants, where the force of falling water drives turbines that make generators rotate.

There are several types of modern dams. Strong solid reinforced concrete dams are designed in such a way that reinforced concrete can withstand water pressure. They are called gravitational because they depend on the gravity of the Earth, which holds the reinforced concrete firmly in place.

Hollow reinforced concrete dams reinforced with steel. They use less reinforced concrete than solid dams, so they are cheaper. Earthen dams are created from mounds of earth and stone. There are also dams and embankments that control river banks and prevent flooding.

Weir is very important for almost every dam. This is a tunnel through which water gradually leaves the reservoir. The weir is used to control the level of water in the reservoir, otherwise it will overflow unpredictably and the water will overflow the banks.

Dams have been installed on rivers around the world for thousands of years. The oldest dam is Egyptian. She is about 4500 thousand years old.

Test your knowledge! Did you know...

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Cargo Buddy Electric Cargo Bike 27.06.2023

The German company Ruff Cycles, aimed at participating in urban mobility, has introduced the Cargo Buddy electric cargo bike. The designers took inspiration from the world of hip-hop and laid-back street aesthetics to create a unique bike design.

Cargo Buddy has a simple tubular frame and wide 80-inch tires, which allows it to have high ground clearance and excellent flotation. In the front part there is a cargo basket in which you can carry up to 260 kg of cargo or place a child. The maximum load capacity of the bike is XNUMX kg including the weight of the rider.

Unlike most cargo bikes, the Cargo Buddy is compact. Its length is 2350 mm and its width is 780 mm. This German bike also has a long saddle that allows the rider to place the child in front of him.

The bike is equipped with a Bosch Performance Line CX engine with 85 Nm of torque (power not specified), Shimano drivetrain and a 500 Wh battery. The battery charge is claimed to be sufficient for daily commuting around the city, though exact numbers are not given.

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