1. CELLS

2. ZOOMING in on CELLS

3. Smallest unit of an organism that carries on life functions.
CELLS
CELL:
Smallest unit of an organism that carries on life functions.

4. How Big is a Cell? ?

5. 2 CELL TYPES

6. PROKARYOTIC CELLS
Unicellular (one-celled) organisms
bacteria

7. EUKARYOTIC CELLS Make up multi-cellular organisms. Protists Fungi
Plants
Animals

8. COMPARING CELLS
Size and shape relate to the cell’s function.

9. STRUCTURAL HIERARCHY

10. CELL WALLS Composed of cellulose ROLE: Protects the cells of Plants
Algae
Fungi
Most bacteria

11. CELL MEMBRANE Protective layer around all cells
Inside cell wall (if the cell has a wall)
ROLE: Regulates material entering and leaving the cell (oxygen, food, waste, etc.)

12. CYTOPLASM Gelatinlike substance inside cell membrane.
ROLE: Scaffolding-like structure, helps cell keep its shape
Contains hereditary info. in Eukaryotic cells to help life processes

13. NUCLEUS ROLE: Contains instructions for everything the cell does.
Includes DNA

14. ENERGY-PROCESSING ORGANELLES
Help cells carry on their processes.
Chloroplasts: green organelles in plants that make food.
Mitochondria: store and release energy from food.

15. MANUFACTURING ORGANELLES
Ribosomes: Make proteins for cell activities.
Sometimes attach to endoplasmic reticulum.

16. PROCESSING, TRANSPORTING, and STORING ORGANELLES
Endoplasmic Reticulum: series of smooth or rough folded membranes where materials can be processed and moved around in the cell.

17. Golgi-Bodies: Stacked, flat membranes
Sort and package proteins, etc. into structures called vesicles.
Vesicles: deliver cellular substances to the cell membrane where they are released.
Vacuole: Temporary storage of materials (water, waste, food, etc)

18. RECYCLING ORGANELLES
Lysosomes: have digestive chemicals that help break down food molecules, cell wastes, and worn-out cell parts.