Gen Bio L2: Cell Theory + Structures and Functions

Cell Theory

1. the fundamental biological principle that states all living organisms are made of cells,

2. cells are the basic units of life

3. and all cells arise from pre-existing cells through cell division.

Who were the people that made cell theory?

2 German Scientists;

Matthais Schleiden - who theorized all plants are made of cells.

Theodore Schwann - he theorized all animals are made of cells.

Rudolf Virchow - cells came from pre-existing cells, but he could have either “borrowed” this theory from a jewish scientist Robert Remak

who, when, and where was the first compound microscope made?

Zacharaius Jensen, early 1600’s, in the Netherlands

Anthon Van Leeuwenhoek

Dutch Scientist

Made his own microscope

discovered bacteria in teeth, dubbed them “Animalcules”

Robert Hooke

English Scientist

looked at a cork under a microscope, coined the term “cell”

Plasma/Cell Membrane

Extremely delicate, thin, elastic, living and selectively permeable membrane

Made up of 2 layers of phospholipid

cell