Cell And Microscope Developments

Art of grinding lenses is developed in Italy

Hanz and Zacharias invent microscope, by placing two lenses in a tube.

This invention improves the resolution visible through the microscope.

Gerd Binnig and Heinrich invent a microsope that can 3D images of objects down to atomic level.

1st part of cell theory discovered by Matthias Schwann and Theodor Schwann. This theory stated that, “All living organisms are made up of one or more cells, and those cells are the smallest unit that we can say is alive”. In short this means that every living object or thing is composed of one or more cells, and the cell is the smallest possible living thing.

The Theory that "The cell is the basic unit of life" is discovered by observing that the smallest thing has the properties of life.

Rudolf virchow discovered the 3rd cell theory which is " All cells come from the devision of preexisting cells". This means that all life came from one cell that reproduced into many more cells.

Langmuir Stated that cell membranes are composed of lipid monolayers, with the fatty acids pointing away form polar heads.

Gorter and Grendel, stated that red blood cells are coated with a layer of fatty acids that is two layers thick.

Described the cell membrane as a ''sandwich" of lipids covered on both sides by protein.