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Cell Anatomy.

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Presentation on theme: "Cell Anatomy."— Presentation transcript:

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


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