The Fundamental Unit of Life Class 9 PPT

 Page 1


CELL – BASIC UNIT OF LIFE
Page 2


CELL – BASIC UNIT OF LIFE
CELL – BASIC UNIT OF LIFE
? Prokaryotic and Eukaryotic Cells
? Multicellular Organisms
? Cell Membrane and Cell Wall
? Cell Organelles
• Chloroplast
• Mitochondria
• Vacuoles
• Endoplasmic Reticulum
• Golgi Apparatus
• Nucleus
? Chromosomes 
• Basic Structure, Number
Page 3


CELL – BASIC UNIT OF LIFE
CELL – BASIC UNIT OF LIFE
? Prokaryotic and Eukaryotic Cells
? Multicellular Organisms
? Cell Membrane and Cell Wall
? Cell Organelles
• Chloroplast
• Mitochondria
• Vacuoles
• Endoplasmic Reticulum
• Golgi Apparatus
• Nucleus
? Chromosomes 
• Basic Structure, Number
DISCOVERY OF CELL
? In 1665 Robert Hooke – an English Scientist, Saw Cells in a thin 
slice of cork with his crude microscope.  
? He observed as “Honey – comb” like Structure and named them 
as CELLULAE or CELLS
? His discovery indicated for the first time that living organisms 
consisted of number of small structures or units.
Microscope
Page 4


CELL – BASIC UNIT OF LIFE
CELL – BASIC UNIT OF LIFE
? Prokaryotic and Eukaryotic Cells
? Multicellular Organisms
? Cell Membrane and Cell Wall
? Cell Organelles
• Chloroplast
• Mitochondria
• Vacuoles
• Endoplasmic Reticulum
• Golgi Apparatus
• Nucleus
? Chromosomes 
• Basic Structure, Number
DISCOVERY OF CELL
? In 1665 Robert Hooke – an English Scientist, Saw Cells in a thin 
slice of cork with his crude microscope.  
? He observed as “Honey – comb” like Structure and named them 
as CELLULAE or CELLS
? His discovery indicated for the first time that living organisms 
consisted of number of small structures or units.
Microscope
? 1665- Robert Hook discovery of cell
? 1674-A. Van Leeuwenhoek-studied living for the first time.
? 1831-Robert Brown discovery and named Nucleus in a cell
? 1838-39-M.J.Schleiden & Schwann formulated Cell Theory
? 1855-Rudolf Virchow, Stated  “Omnis cellula-e-cellula”
TO KNOW THE 
HISTORY OF CELL?
Robert 
Hook
Leeuw
enhoek
Robert 
Brown 
M.J.Schleiden
Schwann
Rudolf 
Virchow
Page 5


CELL – BASIC UNIT OF LIFE
CELL – BASIC UNIT OF LIFE
? Prokaryotic and Eukaryotic Cells
? Multicellular Organisms
? Cell Membrane and Cell Wall
? Cell Organelles
• Chloroplast
• Mitochondria
• Vacuoles
• Endoplasmic Reticulum
• Golgi Apparatus
• Nucleus
? Chromosomes 
• Basic Structure, Number
DISCOVERY OF CELL
? In 1665 Robert Hooke – an English Scientist, Saw Cells in a thin 
slice of cork with his crude microscope.  
? He observed as “Honey – comb” like Structure and named them 
as CELLULAE or CELLS
? His discovery indicated for the first time that living organisms 
consisted of number of small structures or units.
Microscope
? 1665- Robert Hook discovery of cell
? 1674-A. Van Leeuwenhoek-studied living for the first time.
? 1831-Robert Brown discovery and named Nucleus in a cell
? 1838-39-M.J.Schleiden & Schwann formulated Cell Theory
? 1855-Rudolf Virchow, Stated  “Omnis cellula-e-cellula”
TO KNOW THE 
HISTORY OF CELL?
Robert 
Hook
Leeuw
enhoek
Robert 
Brown 
M.J.Schleiden
Schwann
Rudolf 
Virchow
? Just as a building is made up of bricks the body of all living organisms
made up of cells.
? Basing on the cellular organization some organisms are made of single
cells “Unicellular Organisms” e.g. Chlamydomonas, Amoeba,
Paramecium
? Organisms which are made up of more than a cell “multicellular”
? Irrespective of unicellular or multicellular organisms the cells perform
similar basic functions for their survival.
WHAT ARE LIVING 
ORGANISMS MADE UP OF?