| |
|
|
| |
 |
| Introduction |
|
| Did You Know? |
| |
| The cells that make up our body are so small that you would fit over 200 of them on the full stop at the end of this sentence. |
| |
| The word cell is derived from the Latin word “cellula” which means “a little room”. |
| |
| It was the British botanist Robert Hooke who, in 1664, while examining a slice of bottle cork under a microscope, found its structure resembling the box-like living quarters of the monks in a monastery, and coined the word “cells”. |
| |
| In the year 1838, Matthias Schleiden, a German botanist, first proposed the idea that all plants consist of cells. |
| |
| The Dutch scientist A.V.Leenwenhock, in 1674, discovered the minute forms of life such as bacteria and single celled animals in a drop of water. |
| |
| In 1839, Theodar Schwann, another German botanist, asserted that all plants and animals are made up of cells. |
| |
| In 1831, Robert Brown discovered the nucleus in the cell. |
| |
| J.E.Purkinje, in 1840, used the term protoplasm to describe the juicy, slimy gelatinous contents of the cell. |
| |
| In 1885, Rudolf Virchow expressed that all cells arise from pre-existing cells. |
| |
| In 1932, two German Scientists, Ruska and Knoll, invented the electron microscope. |
| |
| Man is estimated to have about 100 trillion (1014) cells in number. |
| |
|
|
| |
|
|
| |
|
|
|
|
|
(100% money-back guarantee)
Customer Care
Click to get customer service, technical support and subscription help.
Refer-A-Friend
Get One Month Free!
When you refer a friend
|
|
|
