Why are The Cells Generally of a Small Size?

What are Cells and Where are they present? How do Cells operate? What are the Benefits of Small Cells?
why are the cells generally of a small size

There are many billions of cells within the human body. These are the building blocks that give the human body structure and the required nutrients. They come in different sizes. In this blog post, we will discuss why are the cells generally of a small size, and the factors that restrict the size of the cell. Also, you will learn why can cells not grow beyond their maximum size and the benefits of small cells.

1. How should a Scientist observe the Overall Shape of the Cell?

Cells being minute in size shall be observed using microscopes to research them properly. It’s an instrument that magnifies a thing and takes micrographs of individual cells. Compared to light microscopes, electron microscopes offer greater magnification, detail, and determination.
Also, when employing a light microscope, you’re using the light’s wavelength to either magnify the image or the specimen itself to create a magnified image of it such that you can easily decipher the shape. (See How many Types of Cells are There in The Human Body?)

2. What influences Cell Size?

The balance between cell growth and the time of cell division determines the size of the cell. The reasons behind why are the cells generally of a small size can be known by studying the differences between a large cell and a small cell.
The three main elements that control the dimensions and forms of cells are the cytoskeleton, the quantity of water inside the cell, and the condition of the cell membrane. (Also read How Many Cells Are in the Human Body?)

3. What are the Factors that restrict the Size of the Cell?

The timing of cellular division and the equilibrium of cell development affect a cell’s size. Factors that restrict the dimensions of the cell are:

  • The ratio of area to volume,
  • The ratio of Nuclei to Cytoplasm,
  • Cell Membrane brittleness, and
  • The Mechanical components are required to keep the cell together. Also, check out when and how do Body Systems work together?

4. Why are the Cells Generally of a Small Size?

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Photo by Qimono on Pixabay

According to the unified cell theory, a cell is the fundamental unit of life, and new cells develop from older ones. The form and size of cells vary, depending on their functions and compositions. To know why are the cells generally of a small size, take a look at the following points:

  • More molecules and ions can pass the cell wall per unit of cytoplasmic volume in smaller cells due to their greater ratio.
  • The reason why cells are so little is so that they can take in nutrition and expel waste quickly.
  • They can control the exchange of particular molecules within the system, thanks to their unique surface area concerning the volume of the cytoplasm.
  • A cell must be the proper size, as it can change its surface area ratio to volume easily when they are small and of the right size.

Hope why are the cells generally of a small size is understood from the above points, which in a way also stated the benefits of small cells. (See How many Heartbeats in a Day of Humans?)

5. Why can Cells not grow beyond their Maximum Size?

The crucial fact is that as cells get bigger, the area-to-volume ratio shrinks. As a result, if the cell expands over a specific point, insufficient material is going to cross the membrane quickly enough to support the larger cellular volume. When this happens the cell must either stop functioning or divide into smaller cells with favorable surface area to volume ratios. So, cells don’t grow beyond their maximum size just to keep other membranes in good condition. (See Are There 9 Holes in Human Body?)

6. Why can’t a Cell be the Size of a Human?

Why are the cells generally of a small size and not the size of a human? Because food and oxygen must be transported to the internal components through the cell membrane, cells are constrained in size. Cells’ outer membrane cannot keep up with their interior as it expands and also the interior expands more quickly than the exterior membrane.

The surface-to-volume ratio, often known as S:V or S/V is a measure that can be used to illustrate this. One unit cells have a surface area of six square units and a volume of one cubic unit. So, the ratio is 6/1, This ratio decreases with cell size which means the cell membrane cannot provide the interior with what it needs to live.

Hence, as we grow older the cells multiply and grow more in number rather than in size. If a cell would grow in size compared to a human, then it would be difficult to carry out digestion and the energy transformation processes in and out of the human body. (See What does the word Queue describe in Cell Biology)

7. Why Small Cells are more efficient?

Small cells are more efficient because the surface area to volume ratio is higher, and nutrients diffuse and move over the cell surface more quickly. A faster rate is crucial for cells to operate properly because it delivers the nutrients they need to do so. Hence, smaller cells are easily controllable and manageable and can effectively transfer oxygen in and carbon dioxide out. Must read what is biomedical engineering?

8. What are the Benefits of Small Cells?

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Small cells play a major role in multicellular organisms like humans and also in unicellular organisms. These are the various benefits of small cells :

  • Smaller cells can easily carry out the absorption and expulsion process as they have a higher surface area to volume ratio.
  • They require less energy to perform their duty of exchanging nutrients with the environment.
  • Smaller cells can transfer messages effectively as nuclei are closer to the plasma membrane.
  • Smaller cells can easily split up and expand easily. 
  • Smaller cells are just easier to replace without affecting the functionality of neighboring cells.
  • These cells can reproduce more frequently, have larger populations and carry out their tasks efficiently. Also, check out the 90 mind blowing human body facts.

9. What Role does the Nucleus play in a Cell?

As you know the answer to why are the cells generally of a small size, it’s time to learn about the role of the nucleus which is a major part of the cell. Except for bacteria and blue-green algae, most cells contain a nucleus, a specialized component that is divided from the rest of the cell by a double layer called the nuclear membrane. This membrane has openings that likely allow big molecules to enter the cell and appears to be continuous with the endoplasmic reticulum, a network of membranes.

  • The nucleus carries the genes and structures that hold the genetic information and control and regulate the functions of the cell (such as growth and metabolism).
  • Small structures called nucleoli are frequently detected inside the nucleus.
  • The nucleus is also the place where ribonucleic acid or RNA is synthesized which serves as a template for the creation of different proteins in the cell.
  • Additionally, it is where the ribosomes, the cell’s protein factories are made. Also, check out why is DNA replication critical to the survival of organisms?

10. What does a Culture Medium provide to a Living Cell?

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Photo by Qimono on Pixabay

The cell receives nutrients from the culture medium. Both macronutrients and micronutrients can be used to achieve this. The culture media also supplies additional elements, such as hormones, much needed for growth. Additionally, it gives the cell a space where it can expel waste products. 

Besides getting to know why are the cells generally of a small size, also take a look at some of the components of the cell. Each component of a cell has a different purpose. These components include organelles, which are specialized structures that carry out specific functions for the cell. They are: 

  • Cytoplasm
  • Cytoskeleton
  • Endoplasmic Reticulum(ER)
  • Golgi apparatus
  • Lysosomes and peroxisomes
  • Mitochondria
  • Nucleus
  • Plasma Membrane
  • Ribosomes

These components are the crux of cells and perform various functions to provide the body with essential nutrients and strength. If cells do not regenerate and grow we would be deprived of proper functioning of our bodies.

So, with this information, here comes the end of the article. In this article, we learned about factors that restrict the size of the cell, the Nuclei’s role in the cell, the benefits of small cells and how and why are the cells generally of a small size. (See What are the Three Parts of Cell Theory?

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