• Contain digestive enzymes

• Found: Animal cells• Jobs:

1) Autolysis: Destroy dying cell

This lysosome is destroying a mitochondrion

• Contain digestive enzymes

• Found: Animal cells• Jobs:

1) Autolysis: Destroy dying cell

2) Break down food

cell

p r o t e in

protein

Lysosome(with enzymes inside)

• Contain digestive enzymes

• Found: Animal cells• Jobs:

1) Autolysis: Destroy dying cell

2) Break down food

3) Kill bacteria

white blood cell

Lysosome(with enzymes inside)

bacteria

bacteria

white blood cell

There are thousands of cilia surrounding this one cell. Lets zoom in for a closer look.

You can now see the individual cilia

• Job: movement

• Cilia = short hair-like extensions (numerous)

This cell has 3 flagella

• Job: movement

• Cilia = short hair-like extensions (numerous)

• Flagella = long whip-like extension (very few)

1 2

3

cell

This cell has 8 flagella

• Job: movement

• Cilia = short hair-like extensions (numerous)

• Flagella = long whip-like extension (very few)

1 2

3

4

5

67

8

cell

Cell membrane

• Outermost layer of plant, fungi, & bacteria cells

• Job: Adds support for growth

• Made of tough cellulose– Hard to digest

• Witnessed by Robert Hooke in 1665

The cell wall is all that remains in cork

• Job: Perform photosynthesis

• Chlorophyll molecules absorb sunlight & convert water and CO2 into sugars

• Endosymbiosis theory: (within, close, living relationship)

Were once free living organisms that became parts of modern cells

• Evidence:– Own DNA and ribosomes– Make proteins– Replicate

chloroplast

• Job: Perform photosynthesis

• Chlorophyll molecules absorb sunlight & convert water and CO2 into sugars

• Endosymbiosis theory: (within, close, living relationship)

Were once free living organisms that became parts of modern cells

• Evidence:– Own DNA and ribosomes– Make proteins– Replicate

Look for them flowing in the cytoplasm during our lab activity!

A large predator cell devours the chloroplast ancestor

Chloroplast ancestor

Chloroplast survives and dividesThe predator cell divides,

splitting apart the chloroplasts

The chloroplasts continue to divide and multiply

The predator cells continue to divide, splitting apart the chloroplastsOver time, the chloroplast and larger cell become dependent on one another

• Job: Stores food, water, waste, color pigments • Plant cells: Large central vacuole• Animal cells: Scattered smaller vacuoles

AB

C

nucleus vacuole

chloroplast

Review1) Pick an organelle…any organelle. Describe its function.2) Name 7 organelles that can be found within the cytoplasm.3) Describe the pathway that proteins travel from creation to

exportation.4) List various reasons to help support the theory of

endosymbiosis.5) Name two organelles that plant cells have and animal cells

do not.6) Which organelle creates ATP energy for cells?7) Which organelle converts sunlight into sugar?8) Which organelle creates ribosomes?9) Which organelle fuses with the cell membrane to release

proteins?10)Which molecule holds the information to make a protein?

Review Continued…11) Identify the organelles in the figure below