1. Cell Structure and Function 7.3

2. Representative Animal Cell

3. Representative Plant Cell

4. Assignment: color and label plant cell and Animal cell – use page 192

5. Organelles
Cellular machinery- works like a factory

6. Cell Walls Found in plants, fungi, & many protists
Surrounds plasma membrane

7. Cell Wall Differences
Plants – mostly cellulose
Fungi – contain chitin

8. Cytoplasm Viscous fluid containing organelles components of cytoplasm
Interconnected filaments & fibers
Fluid = cytosol
Organelles (not nucleus)
storage substances

9. Cytoskeleton Filaments & fibers Made of 3 fiber types 3 functions:
Microfilaments
Microtubules
Intermediate filaments
3 functions:
mechanical support
anchor organelles
help move substances

10. A = actin, IF = intermediate filament, MT = microtubule

11. Cilia & Flagella Provide motility Cilia Flagella Short
Used to move substances outside human cells
Flagella
Whip-like extensions
Found on sperm cells

12. Cilia & Flagella Structure
Bundles of microtubules
With plasma membrane

13. Centrioles Pairs of microtubular structures
Play a role in cell division

14. Nucleus Control center of cell Double membrane Contains Chromosomes
Nucleolus

15. Nuclear Envelope
Separates nucleus from rest of cell
Has pores

16. DNA Hereditary material Chromosomes DNA Proteins
Form for cell division
Chromatin

17. Nucleolus Most cells have 2 or more Directs synthesis of RNA
Forms ribosomes

18. Endoplasmic Reticulum
Helps move substances within cells
Network of folded sacs and interconnected membranes
Where protein and lipids (fats) are synthesized
Two types
Rough endoplasmic reticulum
Smooth endoplasmic reticulum

19. Rough Endoplasmic Reticulum
Ribosomes attached to surface
Manufacture proteins
Not all ribosomes attached to rough ER
May modify proteins from ribosomes

20. Smooth Endoplasmic Reticulum
No attached ribosomes
Has enzymes that help build molecules
Carbohydrates
Lipids

21. Golgi Apparatus Involved in synthesis of plant cell wall
Packaging & shipping station of cell

22. Golgi Apparatus Function
1. Molecules come in vesicles 2. Vesicles fuse with Golgi membrane 3. Molecules may be modified by Golgi 4. Molecules pinched-off in separate vesicle 5. Vesicle leaves Golgi apparatus 6. Vesicles may combine with plasma membrane to secrete contents

24. Lysosomes Contain digestive enzymes Functions Aid in cell renewal
Break down old cell parts
Digests invaders

25. Vacuoles Membrane bound storage sacs
More common in plants than animals
Contents
Water
Food
wastes

26. Bacteria-Like Organelles
Release & store energy
Types
Mitochondria
(release energy)
Chloroplasts
(store energy)

27. Mitochondria
Have their own DNA
Bound by double membrane

28. Mitochondria Break down fuel molecules (cellular respiration) Glucose
Fatty acids
Release energy
ATP

29. Chloroplasts Derived form photosynthetic bacteria
Solar energy capturing organelle

30. Photosynthesis Takes place in the chloroplast
Makes cellular food – glucose

31. Review of Eukaryotic Cells

32. Review of Eukaryotic Cells

34. Let’s Review: 1. What is the role of the nucleus?
Contains DNA and controls the manufacturing of protein
2. What is the function of the rough endoplasmic reticulum?
The ribosomes produce protein for export to other cells.
3. How do plants benefit from cell walls?
Helps them have shape and structure
4. How are cell walls different from the classroom walls?
Cell walls are permeable; the classroom walls are not