1. Cells

2. The Cell The cell is: the basic unit of life
It is the simplest unit capable of:
Independent existence

3. The Cell Life functions: cells themselves are what is alive in organis
1. Reproduction
2. Growth/Development
3. Movement
4. Respiration
5. Digestion
6. Homeostasis
7. Respond/adapt
8. Excretion of wastes

4. The Cell Levels of organization
Cells  tissue  organs  organ systems
Allows for division of Labor

5. The Cell 10 Organ Systems Skeletal Respiratory Muscular Excretory
Digestive
Circulatory
Skin
Integumentary
Respiratory
Excretory
Endocrine
Nervous
Reproductive

6. The Modern cell theory states:
1) Cells are the basic units of structure and function in living things
No organism has been found on Earth that shows the attributes of life and is not composed of cells.

7. Modern Cell Theory 2) All living things are composed of cells
Every living thing is either a single cell or a population of cells

8. Modern Cell Theory 3) All cells come from pre-existing cells
Cells arise only by division of living cells
“From life, comes life”
Process by which cells makes copies of themselves is called mitosis – copies are identical to the original cell

9. Composition of Cells A. Cells are comprised of 90% water
B. Other molecules that make up the cell are:
a. Protein (5.0%)
b. Carbohydrates (1.5%)
c. Nucleic Acids (1.5%)
d. Lipids (1.0%)
e. Other (1.0%)

10. Composition of Cells

11. Types of Cells A. Prokaryotes 1.) Lack a true membrane- bound nucleus
2.) Single-celled
a.) bacteria
3.) DNA located within cell

13. Types of Cells B. Eukaryotes 1. Has membrane-enclosed nucleus
a. information center of the cell and contains DNA
2. Single-celled (unicellular) or many-celled (multicellular)
3. Has other membrane bound organelles
4. There are 2 types of Eukaryotic cells

14. Plant Cell

15. Animal Cell

16. Cell Website