1. Organelles – Chapter 6

2. Plasma Membrane Serves as a boundary between cell and environment
Controls passage of materials into and out of cell

3. Nucleus Manages all cell functions
Contains cells genetic material – DNA
Nuclear envelope with pores
Contains one or more nucleoli

4. Cytoskeleton Network of proteins
Contains hollow microtubules and thick, solid microfilaments
Provides shape, internal organization, and movement

5. Lysosomes Site of intracellular digestion
Digests worn out cell parts, invaders, and food particles

6. Centrioles Occurs in pairs during cell division
Help the cell to divide during mitosis
Only found in animal and protist cells

7. Cell Wall Formed by living plant cells
Made of cellulose; rigid support structure
Protects plants and allows for turgor pressure

8. Mitochondria Enclosed in a double-membrane
Provides the cell with energy
Most reactions of cellular respiration occur here
Contains small amounts of DNA and RNA
May have several hundred per cell

9. Endoplasmic Reticulum (ER)
Tubular membrane system that provides surface area for chemical reactions
Plays a central role in biosynthesis reactions in the cell
Transports compounds made
Rough ER is studded with ribosomes
Smooth ER lacks ribosomes

10. Golgi Apparatus System of flattened sacs
Modifies, sorts, and packages macromolecules in vesicles for secretion or for delivery to other organelles.

11. Cytosol/Cytoplasm Semi-fluid material surrounding organelles
Cellular activities occur here
Contains enzymes that catalyze cellular reactions

12. Chloroplasts
Membrane system forms thylakoids which contains light absorbing pigments
All reactions of photosynthesis occur in chloroplasts
Found in plants and plant-like protists

13. Vacuoles Store Materials such as:
Water, food, digestive enzymes, nutrients, and waste products
Occupies about 50% of plant cells volume

14. Ribosomes Produces Proteins
Found in the cytoplasm and on the Rough Endoplasmic reticulum