Science Video on the Immune System

The electron microscope was invented in the 1940's by a man named Ernst Bruche.

The electron microscope is used for magnifying scanning the services of objects up to 500 000 times the size it also shows there three dimension's.

The transmission electron microscope lets scientists to study structures within a cell.

cells that don't have internal membrane bound structures are called prokaryotic cells.

the cells of most unicellular organisms like bacteria do not have membrane bound structures and are therefore called prokaryotes. cells that containing membrane bound structures are called eukaryotic cells. Most multi cellular plants and animals we know are made up of cells containing membrane bound structures are called eukartotic cells. the membrane bound structures within the cells are called organelles. each organelle to cell survival.