1. The cell

2. All living things are made up of small, individual units called cells Some organisms consist of one cell=unicellular others made up of many cells=multicellular Life processes are carried on by cells

3. Two Basic cell types: Prokaryotic: lack membrane bound structures (nucleus) bacteria Eukaryotic: present in all living things except bacteria; filled with organelles, (membrane bound structures). NUCLEUS –most important

4. Prokaryotic cell

5. Eukaryotic cell

7. Cell Size: Small because of the need to get things in and out of the cell in a timely manner Limited by surface area to volume ratio

8. Cell organelles Nucleus Mitochondria Golgi body Lysosome Vesicle Ribosome Endoplasmic reticulum

9. Nucleus

10. “brain” Control center Controls metabolism + reproduction Contains chromosomes

11. nucleus

12. Mitochondria

13. “Powerhouse” Site of cellular respiration

14. Mitochondria

15. Golgi body

16. Packaging, processing center modifies & transports proteins

17. Golgi body

18. Lysosome

19. Sac-like structure Contains strong digestive enzymes “digestion center” lysol

20. lysosome

21. vesicle

22. Fluid filled sacs Store food, water, waste

23. Ribosome

24. Small particles of RNA Help make proteins

25. ribosomes

26. Endoplasmic Reticulum

27. Pathway for transport of material Large surface area site of protein synthesis

28. Endoplasmic reticulum-smooth

29. Endoplasmic reticulum-rough