1. Cells “The Building Blocks of Life”

2. What is a Cell?
The structural and functional units of all living organisms.
What is a theory?
A set of statements or principles devised to explain a group of facts or phenomena
Based on limited information or knowledge
Verified of falsified through experimentation

3. History of Cell Theory Robert Hooke - 1665 Anton van Leeuwenhoek 1674
Used microscope to study cross-sections of cork which he called “cells”.
Anton van Leeuwenhoek 1674
Used a simple microscope to describe tiny cells and bacteria
Theodor Schwann
Concludes that all animals are made of cells

4. Cell Theory All living things are composed of cells
2) Cells are the basic units of structure and function in living things
All cells come from pre-existing cells
Exceptions: Viruses
- Not composed of cells
- Cannot survive without a host

5. More about cells… Cells fall into two categories
Eukaryotes – Plants, animals, fungi
Cells that contain organized nuclei
Prokaryotes - Bacteria
Cells that contain a non-organized nuclei

7. Eukaryotic Cell Structure
2 Types
Animal
Plant
Found only in plants
The major parts found in both
Nucleus
Cell
Membrane
Cytoplasm
Ribosome
Mitochondria
Cell
Wall
Chloroplast
Allows
materials
to enter
and
exit
Provides
shape
Provides
support
Carry out
Photosynthesis
Contains
DNA
Makes
Protein from
amino acids
Makes
energy