Important Facts About the Fundamental Unit of Life in CBSE Class 9 Science

Important Facts About the Fundamental Unit of Life in CBSE Class 9 Science

Then the fundamental unit of life, or as we all know it – the cell is a very important chapter in NCERT science book class 9. It is also the stepping stone or the introduction to biology- a field of science which deals with the study of living organisms.

In further classes, students get to study about the cell in more detail. Basically, the cell is the basic structure of organisms. Everything in living organisms is made up of cells.

Since it is such an important part of our lives, it also holds the same importance in terms of the syllabus. The fundamental unit of life chapter in NCERT science book class 9 is one of the most crucial and scoring topics in examinations. Some students struggle to understand its chapters but lately, it has been seen that with help of creative videos and presentations, students are not only able to visually understand the topics and various functions but they are also enjoying the subject.

Here are some facts about the mighty unit of our lives:

  •       Cell is known as the structural unit of life as it provides structure to our body.
  •       It is famous as the functional unit of life because all functions of the body take place at the cell level.
  •       Cell was discovered by Robert Hooke in 1665 and later he discovered the nucleus in the cell in 1831.
  •       The environment outside the cell is separated from the inside of the cell by the cell membrane.
  •       In some cells, different parts are separated by plasma membranes.
  •       Cells are made up of proteins and organelles, a subcellular structure that performs different functions in the cell
  •       Cell is responsible for organising; it has various parts and each part has a different set of functions.
  •       Some cells divide and reproduce quickly. For example, skin cells.
  •       The longest cells in humans are known as motor neurons. They can be up to 4.5 feet i.e., 1.37 meters long and run from the lower spinal cord to the big toe!
  •       RBC’s or the red blood cells are responsible for carrying oxygen to different parts of the body and they get created inside the bone marrow of our bones.
  •       The largest cell in the human body is a fertilized egg but it is still too small to be seen with the naked eye!
  •       The cell membrane not only holds different contents of the cell together it also acts as a receptor for identifying the cells to other cells.
  •       Mitochondria is known as the powerhouse of the cell. It is a tiny structure that provides energy to the cell for performing its functions.
  •       Each cell is assigned a special function. These are also known as specialised cells. And each group of specialised cells forms a tissue.
  •       Cell theory states that all living organisms are composed of cells, it is the fundamental unit of life and all new cells come or born out of pre-existing cells.
  •       Scientists have estimated that about 95% of all the cells in the body are bacteria! The vast majority of these microbes can be found within the digestive tract and billions of bacteria also live on the skin!
  •       The red blood cells in animals do not have a nucleus.
  •       Some cells in animals can also swim when necessary. For example, Protozoans.
  •       Stem cells in animals are capable of transforming the body needs into any necessary cell.
  •       70% of the cell is water.

For more such interesting facts about the cell or other topics in NCERT science book class 9 or for any kind of NCERT solutions for class 9 science, download mobile learning app – Learnflix. It is a mobile educational app which provides solutions to every study related problem.


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