http://www.google.com/url?sa=i&rct=j&q=bacterial%20cell&source=images&cd=&cad=rja&docid=XaGl3hG0jC1k5M&tbnid=0-Hkq_Baj1NJQM:&ved=0CAUQjRw&url=http%3A%2F%2Fmicro.magnet.fsu.edu%2Fcells%2Fbacteriacell.html&ei=J5gvUu23B4vU9QTe84CYBg&bvm=bv.51773540,d.aWc&psig=AFQjCNEyd27dbVpj7ine0mDLQ2SGOcGB4w&ust=1378937246439353

http://www.google.com/url?sa=i&rct=j&q=animal%20cell&source=images&cd=&cad=rja&docid=nESFKKerDJOzVM&tbnid=rPk7s90EgGbLKM:&ved=0CAUQjRw&url=http%3A%2F%2Fbiogeonerd.blogspot.com%2F2013%2F01%2Fcell-organelles.html&ei=-pcvUqOgKJTI9gSDtIHICQ&bvm=bv.51773540,d.aWc&psig=AFQjCNGpJfLMKsfar_HGB7R89hWyOzkpbA&ust=1378937199259674

http://www.google.com/url?sa=i&rct=j&q=plant%20cell&source=images&cd=&cad=rja&docid=Eom7j6fVOGQ3tM&tbnid=IvPoz1H6sVsrnM:&ved=0CAUQjRw&url=http%3A%2F%2Fmicro.magnet.fsu.edu%2Fcells%2Fplantcell.html&ei=zpcvUtWyGpTo8wSg6YC4Bg&bvm=bv.51773540,d.aWc&psig=AFQjCNEcZTdtbkV2AsrzxVjKg1gfEh0ERg&ust=1378937147720418

4A Cell Organelles

• specialized structures within a living cell

Cell Wall

Structure

•Outer layer of a cell

•Made of cellulose

•Rigid & strong

Cell WallFunction

• Provides support (maintains cell shape)

• Protects cell• Helps maintain cell shape

• Allows O2, H2O, & CO2 into & out of cell

Cell Wall

Cell (Plasma) Membrane

Structure

•Outer layer of an animal cell

•Inside cell wall in plants

•Selectively permeable

•Double layer of phospholipids with proteins

Cell (Plasma) MembraneFunction

• Provides support & protection

• Controls movement of materials into & out of cell

• Maintains homeostasis - balance

Cell (Plasma) Membrane

Nucleus

Structure

•Large, dark center of cell

•Holds DNA

NucleusFunction

• Controls all cellular activities

• Contains hereditary (genetic info) material of the cell

Nucleus

Cytoplasm

Structure

•Clear, thick, jellylike material

•Organelles are found inside cytoplasm

•Contains the cytoskeleton fibers

CytoplasmFunction

• Supports and protects cell organelles

Cytoplasm

ChloroplastStructure

• oval shaped containing chlorophyll (green pigment)

• Stacks of thylakoids inside called grana

• Gel-like, innermost substance called stroma

Chloroplast

Function

•Uses E from the sun to make food (glucose) for plants in a process called photosynthesis

•Releases oxygen

Chloroplast

Mitochondria

Structure

•Peanut shaped

•Double membrane w/ smooth outermembrane

MitochondriaFunction

• Breaks down glucose molecules to release energy in the form of ATP

• Site of aerobic respiration

• Releases CO2

Mitochondria

Endoplasmic Reticulum (ER)

Structure

•Network of tubes or membranes

•Smooth without ribosomes

•Rough with ribosomes

•Connects nuclear envelope & cell membrane

Endoplasmic Reticulum (ER)Function

• Carries materials through cell

• Aids in making proteins & transporting them to Golgi bodies

Endoplasmic Reticulum (ER)

Ribosome

Structure

•Small round bodies free or attached to ER

•Made of rRNA & protein

RibosomeFunction

• Synthesize (make) proteins

Ribosome

Ribosome

Lysosome

Structure

•Small & round with a single membrane

LysosomeFunction

• Breaks down larger food molecules into smaller molecules

• digests old cell parts

Lysosome

Golgi Body (apparatus)

Structure

•Stacks of flattened sacs

Golgi Body (apparatus)Function

• Modify proteins made by the cells

• Packages & exports the proteins

Golgi Body (apparatus)

Centrioles

Structure

•Paired structures near the nucleus

•Made of a cylinder of microtubule pairs

CentriolesFunction

• Assist in cell division

Centrioles

Vacuoles

Structure

•Fluid-filled sacs

•Largest organelle in plant cells

VacuolesFunction

• Store water, food & wastes

• Store large amounys of food or sugars in plants

Vacuole

Cilia

Structure

•Short, hair-like structures

CiliaFunction

• Aids in movement

Cilia

Flagella

Structure

•Long, tail-like structures

FlagellaFunction

• Aids in movement

Flagella