The smallest living part of an organism is a cell

All plants, animals and human beings are made of small units called cells

 

 

Example

Our body has trillions of cells.

Different  cells in our body perform different function

 

Hence we can say that

Cell is smallest unit of life which has a definite structure and perform different functions




Why is cell called a Basic Structural unit?

It is because they are the basic unit of life

All plants and animals are made up of cells

 

Just as a house is made of different rooms, different rooms are made of walls and walls are made up of different bricks (non living)

 

Similarly, our body is made up of different organs and different organs are made up of tissues which are made of different cells (Living organism)

 

Hence, a cell is a basic structural unit of living organism

Brick wall and onion peel - Teachoo.jpg

Structural units of Living and Non Living organisms - Teachoo.jpg

 

Who discovered cells?

It was discovered by Robert Hooke in 1665

He discovered cells in cork (bark of oak tree)

He observed cork under a microscope

He saw  different compartments which were separated by walls

He called them cells (as they looked like prison cells)

Robert Hooke Diagram of a cell.jpg

 

Questions

NCERT Question 1 (c)  - Indicate whether the following statements are True (T) or False (F).

The basic living unit of an organism is an organ. (T/F)

View Answer

 

NCERT Question 8 - ' Cells are the basic structural units of living organisms’. Explain.

View Answer

  1. Class 8
  2. Chapter 8 Class 8 - Cell — Structure And Functions

Transcript

Structural units of Non-Living Organisms House Rooms Walls Bricks Structural units of Living Organisms Body Organs Tissues Cells

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 9 years and a teacher from the past 16 years. He teaches Spoken English, Written English, Grammar and Vocabulary at Englishtan.