Cell Theory
Section 7-1
CELL THEORY
1. Cells are the basic units of life
2. All living things have cells
3. All cells come from existing cells
CELL THEORY
1. The basic unit of life is the cell. (Hooke)
 In 1665, an English scientist named
Robert Hooke made an improved
microscope and viewed thin slices of
cork plant cell walls
 Hooke named what he saw "cells"
CELL THEORY
2. All living things are made of 1 or more cells.
 Matthias Schleiden (botanist studying plants)
 Theodore Schwann (zoologist studying animals) stated
that all living things were made of cells
Schwann
Schleiden
CELL THEORY
3. All cells divide & come from old cells. (Virchow)
Virchow
Types of Cells
 Prokaryote – has no nucleus or organelles
- usually unicellular (1 cell)
- bacteria & viruses
 Eukaryote – has a nucleus and organelles
- usually multicellular (more than 1 cell)
- plants & animals
 Both have a cell membrane & cytoplasm
PROKARYOTE & EUKARYOTE
Section 7-1
Cell membrane
Cytoplasm
Prokaryotic Cell
Cell membrane
Cytoplasm
Nucleus
Eukaryotic Cell
Organelles
Go to
Section:
PROKARYOTE VS. EUKARYOTE
Venn Diagram
Section 7-2
Prokaryote
Go to
Section:
Eukaryote
Animal Cell
Section 7-2
Ribosome
(fixed)
nucleolus
nucleus
Nuclear
envelope
Rough
ER
Cell
membrane
mitochondria
Smooth
ER
Golgi
Complex
Go to
Section:
Ribosome
(free)
centriole
Plant Cell
Section 7-2
Vacuole
Smooth endoplasmic
reticulum
Ribosome
(free)
Chloroplast
Cell
Membrane
Ribosome
(attached)
Nuclear
envelope
Cell wall
Nucleolus
Golgi apparatus
Mitochondrian
Go to
Section:
Nucleus
Rough endoplasmic reticulum
Venn Diagrams
PLANT CELL VS. ANIMAL CELL
Venn Diagram
Section 7-2
Animal Cells
Lysosomes
centrioles
Go to
Section:
Plant Cells
Cell membrane
Ribosomes
Nucleus
Endoplasmic reticulum
Golgi apparatus
Mitochondria
Cytoskeleton
Cell Wall
Chloroplasts
Vacuoles