1. Intro to Cells
Chapter 7 Pages

2. Biology is the study of lifeSO
……what does it mean to be living?
Mrs. Brown Rocks!

3. To be living an organism must…...
Be based on a universal genetic code
Grow and develop
Be able to reproduce
*Sexually
*Asexually
Use materials and energy- metabolism
Be able to respond to their environment
*Stimulus Response
Maintain stable internal environment- homeostasis
Change over time, as a group- evolution
Made of units called cells

5. Cells in organisms are specialized to perform different tasks.
Muscle
Blood
NOT
Skin
Brain

6. Levels of Organization
Cell
Tissue
Organ
Organ System
Organism

7. Levels of Organization
Atom
Element
Molecule
Compound
Cell
Basic units of life; perform special jobs
Tissue
Similar cells function together
Organ
Different tissues
function together
Organ System
Different organs function
together
Organism

8. Cell Theory Cell Theory Matthias Schleiden
all plants are made of cells
Theodore Schwann
all animals are made of cells
Rudolf Virchow
all cells came from pre-existing cells
Cell Theory

9. All living things are composed of cells
Animal Cell
Plant Cell
All living things are composed of cells
Cells are the basic units of structure and function in living things
New cells are produced from existing cells

10. Cell Types PROKARYOTE EUKARYOTE No nucleus
No membrane-bound organelles
Small ribosomes
Most cells are μm in size
Evolved 3.5 billion years ago
Found only in Archaebacteria and Eubacteria Kingdoms
EUKARYOTE
Has nucleus
Many organelles
Larger ribosomes
Cells can be between 2 - 1,000 μm in size
Evolved 1.5 billion years ago
Includes Protista, Fungi, Plantae and Animalia Kingdoms

12. Cell Type: Prokaryotes
Prokaryotes, which includes all bacteria, are the simplest cellular organisms. They have genetic material but no nucleus.
Typical bacteria cell

13. Cell Types: Eukaryotes
Eukaryotic cells contain a membrane-bound nucleus and numerous membrane -enclosed organelles (e.g., mitochondria, lysosomes, Golgi apparatus) not found in prokaryotes.

14. What Are the Parts of Cells
Both prokaryotic and eukaryotic cells have some things in common.
All cells have
cell membrane
cytoplasm
ribosomes
genetic material
nuclear material
cell membrane
ribosomes
cytoplasm