Understanding the Cell

Have you ever wondered, about the survival of fishes and other organisms in water, plants and trees on land, animals and birds, and importantly humans? Although they all vary in their shapes, sizes, colors, habitats, and lifestyles, still they share one common thing among them and that is life.

So, we can say that every living being whether it is a bacteria, protozoa, pseudopodia, ant, worms, plants, or giant living being, if it has life it is made up of one basic unit, that is the cell.

What are Cells?

Cells are the basic structure or the building body of any living being, and in fact, the cell itself is a machine that can run a life, as it has various components that perform different functions and can produce the required components to survive.


Although cells may widely vary in their shapes, sizes, and numbers, still they have many common features, whether it is a unicellular (single cell) or multicellular. As they adapted to different environments, with the changes in time and climate they have modified and evolved a lot.


Nerve cells are long, and thin which can extend up to meters, and work in giving and receiving signals. Muscle cells have different roles and are of different types. In the same way, plant cells provide rigidity and structural support to the plants, the long trees have a few different cells, that give them outer woody structure.

Concept of Cells

Cells are the primary and vital unit of life, they are present in numerous shapes and sizes though are recognizable through microscopes, not with a naked eye. Cells are enclosed within a protective, selective membrane known as the cell membrane.

Likewise, the wall of a house protects us and maintains a boundary between the external and internal environment, the same is the role of the cell membrane or sometimes referred to as the plasma membrane.

What is Plasma Membrane?

Plasma membrane functions as the barrier rather than the selective barrier and permits the entry of nutrients and exit of the waste matter. The internal environment of the cell is well arranged into specialized and distinct compartments (also known as organelles).

Each organelle is enclosed within a separate membrane and is always ready to perform its part of the role, as soon as it will receive the signals. Out of all the organelles, the major one is the nucleus, which contains the genetic information of the particular organisms. This genetic information is essential in for cell and individual growth, as well as reproduction. There is only one nucleus in a cell, though there can be a number of other organelles.

Apart from the Nucleus, Mitochondria, Lysosomes, Ribosomes, Golgi bodies, and Endoplasmic Reticulum, are the vital organelles present in a cell. But the most important factor is the platform upon which these organisms lie and perform their various functions, and that is cytoplasm.

What is Cytoplasm?

The cytoplasm is water base fluid, that maintains the interior environment of a cell, it is the place where all the cellular organelles are present and serve as a podium for the various chemical reaction to take place. Other functions like cell expansion, growth, and replication are also carried out at this place of the cell which is the cytoplasm.

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