Definition of Cells
Surely you often hear the term cell, right? Obviously, because discussions about cells are often discussed in natural science lessons, more precisely biological sciences.
To discuss more about cells, you need to know in advance what is meant by cells. The definition of cells is which is the smallest unit and constitutes the organism.
Therefore, cells can be said to be the smallest part of living things. Every living cell has a membrane and also a liquid that is often referred to as cytoplasm. Not only that, the cell also has a nucleus, in the sense of the core material.
To better understand what is meant by cells, you can refer to the opinions of some experts below. Here is a cell understanding according to several experts:
Robert Brown thinks that the understanding of cells is a cell nucleus whose existence is always present in the cell and that the existence of the cell nucleus is very important, which is used to regulate all processes that have occurred inside cell. And Robert Brown is someone who first stated that the nucleus is a part of living things.
Johannes Purkinye and Felix Durjadin assume that the notion of cells is within a cell structure there is fluid in the cell, and the fluid is called protoplasm.
Max Schultze assumed that the notion of protoplasm in cells is a basis of physical life. Where protoplasm is a container for a life process.
Robert Hooke assumed that the definition of cells is a small place and limited by walls. This statement was issued by Hooke when he had succeeded in completing his research using a simple cork and microscope.
Schleiden assumed that the understanding of cells is the smallest unit found in plants. Dan Schwann also carried out a study on animals, and he found in the body of the animal had a large number of cells arranged.
In essence, cells have 6 main functions. That can provide support and structure, can be a means of active and passive transfortasi, can be a means of metabolic reactions, can be a means of reproduction, can be a means of growth that passes through mitosis, and can produce energy.
1. Can provide support and structure
Sclerenchyma and collenchyma in a cell are useful for providing structural support, all cells also generally provide a structural basis for all existing organisms. For example, like kukit consists of a number of skin cells.
2. Can be a means of active and massive transportation
Cells send nutrients to be used in several chemical processes that are taking place in them. This process will produce waste and will be discarded by the cell. Small molecules such as carbon dioxide, oxygen and ethanol will pass through cell membranes which have also passed a simple diffusion process.
This will also be regulated by a concentration gradient that passes through the cell membrane. This is called passive transportation. However, large molecules, for example such as polysaccharides and proteins, will then enter and exit the cell through the active transport process.
Which cells will then use vesicles to be able to remove or absorb large molecules.
3. Can be a means of metabolic reactions
Metabolism in the interior can claim all chemical reactions that will occur in an organism, which can be used to keep it alive. The reaction can be said to be anabolic or catabolic.
The process of producing energy by breaking down molecules is often referred to as catabolism. In anabolic reactions, it can use energy and is useful in making a substance that is even bigger and simpler.
4. Can be a means of reproduction
The reproductive system is very important for the survival of several species. Cells can also help with reproduction through the process of mitosis and meiosis.
5. Can be a means of growth passing through mitosis
In complex organisms, a number of growing tissues can multiply cells that are also simple. This can be seen from the mitotic process, in which stem cells appear to break down so that they can form two daughter cells that are similar to them.
Not only that, mitosis is also a process that occurs where simpler organisms can produce, which will cause new organism
6. Can produce energy
A continuation of the life of a number of organisms depends on thousands of chemical reactions that have been carried out without stopping cells. In order to carry out this reaction, a cell is in desperate need of energy.
Some plants or plants can obtain energy from photosynthesis, while animals obtain energy from the mechanism, ie other words of respiration.
All living things on this surface have only one of the types of cell structures below. And the difference between the two cells is dilihst and the position of DNA contained in a cell. The following explanation:
- Eukoriota cells are cells contained in the body of living things that have a cell nucleus or nucleus.
- Whereas Prokaryotes cells are a cell contained in the body of a living creature that does not have a cell nucleus or nucleus. The right makes the DNA of the cell cannot be encased by an organelle membrane.
In a cell, it can be divided into 3 main parts, as follows:  1. Cytoplasm
Cytoplasm is a mass of protoplasm and is located in an area within a cell, precisely that is between the nucleus and the cell membrane. In siroplasma there is also the most important part which is divided into 2, namely the outer area or commonly called the Etoplasm and the inner area which is often called Endoplasm.
Cytoplasm can also have a liquid or gel form. It also has a very important role in the transportation of food substances.
Organelles are an organ or part of a cell that has certain functions. These organelles are Ribosomes, Plastids, Cell Nucleus, Golgi Bodies, vacuoles, Lysosomes, Mitochondria Reticulum, Micro Body, Endoplasm, Microfilaments, and Microtubules.
3. Cell walls found in plants or cell membranes found in animals
Cell membranes are a part that is located outside of the cell and cytoplasm, which has a function to be able to regulate substance exchange and protect the area in in cells. And what is in plant cells is called the cell wall which has the following functions:
- Can prevent cells from breaking
- Can be a place for water and minerals to move
- Can strengthen a cell
- protect areas that are located in deeper areas.
Thus the discussion about the definition of cells along with the most important components contained in them. Hopefully this article can be useful for you.
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