Biotech
...elements such as carbon, hydrogen, oxygen, and nitrogen. The organization of these molecules into Cells is one feature that distinguishes Living Things from all other matter. The CELL is the smallest unit of matter that CAN Carry on ALL the PROCESSES OF LIFE.
THE DISCOVERY OF CELLS
The cell is the fundamental basic unit of life. Or
A cell is the smallest unit that can carry on all of the processes of life.
Leewenhoek became the first person to observe & Microscopic organisms & Living Cells.
In 1665, Robert Hooke used a microscope to examine a thin slice of cork and described as "a great many little boxes". He called them "Cells".
In 1831, Robert Brown was observed the particular structure called Nucleus.
In 1838, German Botanist Matthias Schleiden studied a variety of Plants and concluded that all Plants are composed of “Cells”.
In 1839, German Zoologist Theodor Schwann reported that Animals are also made of Cells.
In 1855, German Physician Rudolf Virchow induced that “The Animal arises only from an animal & The Plants only from a plant”. OR "Cells only come from other cells”.
The combine work of Schleiden, Schwann, & Virchow make up the modern CELL
CELL THEORY.
The Cell Theory consist of THREE Principles:
A. All living organisms are composed of one or more cells.
B. Cells are the basic units of structure and function in an organism.
C. Cells come only from reproduction of existing cells.
Most cells are small for Two Reasons:
A. Cells are limited in size by the Ratio between their Outer Surface Area & Their Volume. A small cell has more surface area than a large cell for a given volume of Cytoplasm. This is important because the nutrients, oxygen, and other materials a cell requires must enter through it surface. As a cell grows larger at some point its surface area becomes too small to allow these...
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