Engineeringdev

  ​ Cell Notes 1: CONTENTS   The Cell   History   Structure of Cell    Cell Organelles  THE CELL Cell is the functional & structural unit of life as all the metabolic activity takes place in a cell. The study of structure & composition of cell is known as cytology.  HISTORY Robert Hooke used a primitive compound microscope to examine thin slices of cork from the bark of an oak tree. He observed the hollow box like structure similar to honey comb for which he coined the term cell'.   Unicellular Organisms :   In these organisms, all the function like nutrition, respiration, excretion & reproduction are carried out by the single cell. Example  Amoeba.  Multicellular Organisms :   Organisms which are made up of a few to billions of cells. Example Plants & Animals.  Shape of Cell :   The Cells of animals & plants may be oval, spherical, cuboidal, columnar, polygonal or spindlelike. Neuron is the longest cell in animal bod

1.  Nutrition in animals and plants