1. Cells

2. Cells
Definition: A membrane covered structure that contains all of the materials necessary for life.
Examples: Bone cell, blood cell, skin cell

3. Tissues
Definition: A group of cells that work together to perform a specific job in the body
Examples: Blood, fat, muscle

4. Organ Definition: a group of tissues that work together.
Examples: Heart, lungs, skin
Skin is the largest organ!

5. Organ System Definition: a group of organs that work together
Examples: digestive system, respiratory system, excretory system

6. Organism Definition: Anything that can live on its own
Examples: Lions, Tigers, and Bears

7. Prokaryotic Cell
Does NOT have a nucleus or any other membrane covered organelles

8. Eukaryotic Cell
Describes a cell that has a nucleus

9. Unicellular Organism
-single celled organism
Multi-cellular Organism
-more then one celled organism

10. Population
A group of individuals of the same species that live together in the same area at the same time

11. Community
All of the populations of different species that live and interact in an area

12. Ecosystem
A community of organisms and their nonliving environment

13. Question #1 QUESTION #2 TISSUES
1. Cells are related to _________ in the same way that _________ are related to organ systems.
QUESTION #2
The cells of unicellular organisms can survive on their own, but the cells of multi-cellular organisms must remain a part of an organisms body to survive.
ORGANS

14. DISCOVERY OF CELLS

15. #1 What are the three parts of the Cell Theory?
All organisms are composed of one or more cells
The cell is the basic unit of life in all living things
All cells come from existing cells

16. #2 Robert Hooke
saw the first cork cell using a compound microscope.

17. #4 Advantages to being multicellular
#3 All cells have
Cell membrane
DNA
Cytoplasm
#4 Advantages to being multicellular
Grow larger
Have cells that are specialized for different tasks

18. #5 Define Prokaryotic cells and Eukaryotic cells:
Prokaryotic are cells that do NOT have a nucleus
Eukaryotic are cells that do have a nucleus

19. #6 How are eukaryotic cells and prokaryotic cells different?
-no nucleus
-no membrane-bound organelles
-circular DNA
-Bacteria is an example
Eukaryotic
-has a nucleus
-membrane-bound organelles
-linear DNA
-all other cells!

20. #7 What are organelles? #8 What is the cytoplasm?
Structures (and chemicals) within a cell that enables the cell to live, grow, and reproduce
#8 What is the cytoplasm?
Fluid within a cell

21. #9 What is the function of the cell membrane?
Acts as a barrier between the inside of the cell and its environment
#10 What is DNA?
Hereditary Material

22. #11. Why do all cells need DNA?
DNA controls all of the activities of a cell and contains the information needed to make new cells