2. Cells By: Ashley Frazier and Christine Jackson Period:6th

3. Nucleolus A small structure within the cell nucleus that contains RNA and proteins. A small structure within the cell nucleus that contains RNA and proteins.

4. Nucleus The control center of the cell Protected by the nuclear membrane – extra thick Contains nuclear pores (passage way to the inside of nucleus – lets out instructions to the rest of the cell)

5. Nuclear Envelope “Double membrane” layer “Double membrane” layer Extra thick Extra thick Closses off DNA from cytoplasm Closses off DNA from cytoplasm

6. Cytoplasm :“jelly like substance” called cytosol :Protects the organelles :Supportive framework (cytoskeleton )

7. Lysosome Contain powerful enzymes to break up old cell components and bacteria Contain powerful enzymes to break up old cell components and bacteria Considered the “garbage disposal” of the cell Considered the “garbage disposal” of the cell

8. Mitochondria Energy source of the cell Contains cristae – needed for aerobic respiration Vary in size and shape Reproduce by diving

9. Golgi Apparatus Composed of flattened sacs Composed of flattened sacs Packages and delivers proteins Packages and delivers proteins

10. Smooth ER Not covered in ribosomes Functions in the synthesis of lipids

11. Rough ER Made up in folded membrane Made up in folded membrane Appears rough because it is covered in ribosomes Appears rough because it is covered in ribosomes Provides a tubular transport system in cell Provides a tubular transport system in cell Functions in the synthesis and transport of protiens Functions in the synthesis and transport of protiens

12. Cell Membrane Selectively permeable: allows only certain objects in and out “barrier of protection” Signal transduction: way to relay info about outside environment

13. mitosis Division of a somatic cell to form two genetically identical cells Division of a somatic cell to form two genetically identical cells

15. The end