Cell HistoryMajor events and diversity of cells

Know the peopleRobert Hooke: named cells “cells” Anton van Leeuwenhoek: living cells, bacteria

and protozoaMatthias Schleiden: plants have cellsTheodore Schwann: animals have cellsRudolf Virchow: cells come from existing

cellsThree scientists for cell theory

Cell Diversity: Size (A.)Size is limited by:

SURFACE AREA TO VOLUME RATIOAs volume (mm3) increases, surface area (mm2)

does not increase as quickly. This limits how big the cell can get, making cells remain soooo small

Need more explanation??? Click HERE

Light and Electron MicroscopeLight Microscope Electron Microscope

Notice a different between the two microscopes?

Cell Diversity: Shape (B.)Structure (shape) reflects functionNerve Cell:

Skin Cell:

Blood Cell:

Cell Diversity: Internal Organization (C.)Organelle: component of the cell that has a

specific function for cell survivalEukaryote: YOU are a eukaryote (pun is

intended)cells that contain a nucleus(all animals and

plants)Prokaryote: cells that do not have a nucleus

(protists, bacteria)