1. Cell Anatomy

2. Cell Basic unit of living organisms ~60% water
Bathed in interstitial fluid (external)
Vary in shape and function
3 main regions
Nucleus, plasma membrane, cytoplasm

3. Nucleus Control center, contains genes 3 regions Nuclear envelope
Double membrane
Nucleoli
Site of ribosome assembly
Chromatin
Genetic material
Condenses to form chromosomes during cell division

4. Plasma Membrane Barrier between cell contents and environment
Lipid bi-layer, cholesterol, proteins
Assembled tail to tail
Head – hydrophilic
Tail- hydrophobic
Selective permeability

5. Plasma Membrane Specialized Parts
Microvilli
Folds, increase surface area
Membrane junctions
Tight junctions
Connect cells in sheets
Desmosomes
Anchor, prevents pulling apart
Gap junctions
Communication

6. Cytoplasm Internal cellular material Contains three elements Cytosol
Fluid that suspends the other elements
Inclusions
Stored products/nutrients
Organelles
Metabolic machinery

7. Cell Organelles Mitochondria – site of ATP generation
Ribosomes – site of protein synthesis
Endoplasmic reticulum – fluid filed tubules
Rough ER – studded with ribosomes
Smooth ER – lipid metabolism, detoxification
Golgi apparatus- flattened stack of sacs, modifies and packages
Lysosomes – cell demolition site
Peroxisomes – detoxifies poisons and reactive chemicals

8. Cell Organelles Cytoskeleton - Internal framework Cell projections
Composed of
Intermediate filaments – resist forces
Microfilaments – cell motility, shape changes
Microtubules – determine shape, organelle distribution
Cell projections
Cillia – hair like appendages
Flagella – long projections, motility

9. Cell diversity Over 200 types in the human body
All vary in shape and function
Specialized
Connect
Cover
Move
Storage
Fight disease
Control/information gathering
Reproductive

10. Cell diversity