Definition of Cell A cell is the smallest unit of life that can perform ALL the life functions.

Cell Theory All living things are made up of cells. Cells are the smallest working units of all living things. All cells come from preexisting cells through cell division.

Examples of Cells Amoeba Proteus Plant Stem Bacteria Red Blood Cell Nerve Cell

Eukaryotic Prokaryotic Two Types of Cells Eukaryotic Prokaryotic

Prokaryotic Cell Prokaryotes No nucleus No membrane bound organelles Unicellular Some have cilia (hair-like structures) and some flagella (whip-like tail) for movement. Example:bacteria

Eukaryotic Cell Contain organelles surrounded by membranes Most living organisms, (multicellular) Plant Animal

Prokaryotes vs. Eukaryotes No nucleus No organelles Bacteria Much smaller Unicellular Eukaryotes Nucleus Organelles Unicellular (protists) and multicellular (animal and plants) Amoeba Plant Cell

Animal Cell Plant Cell http://web.jjay.cuny.edu/~acarpi/NSC/images/cell.gif

Cell Parts Organelles little organs inside of a cell. They are used to: transport of materials capture and release energy Building proteins waste disposal Send and receive information movement Cell membrane Cell wall cytoplasm Nucleus Chromosomes Endoplasmic reticulum Smooth / rough Ribosomes Mitochondria Golgi bodies Vacuoles Lysozome Chloroplast

Animal Cell Figure 7-5 Plant and Animal Cells Section 7-2 Go to Section:

Cytoplasm Gel-like mixture Nickname: Cell Jelly Function: Provides the cell with structure and support

Eukaryotic Cell Organelles and Function Cell membrane Nickname: “The Gate” Function: Controls movement in and out of the cell http://library.thinkquest.org/12413/structures.html

Eukaryotic Cell Organelles and Function Nucleus Nickname: “The Control Center” Function: Directs cells activities/holds DNA

Chromosomes In nucleus Made of DNA Contain instructions for traits & characteristics Contains hereditary material http://library.thinkquest.org/12413/structures.html

Do Now Describe the differences between prokaryotic and eukaryotic cells.

Eukaryotic Cell Organelles and Function Endoplasmic Reticulum (ER) Nickname: “Cellular Highway” Function: The internal delivery system of the cell

Endoplasmic Reticulum 2 Types: Rough ER: Rough appearance because it has ribosomes Function: helps make proteins, that’s why it has ribosomes Smooth ER: NO ribosomes Function: makes fats or lipids

Eukaryotic Cell Organelles and Function Mitochondria Nickname: “The Powerhouse” Function: Energy formation Breaks down food to make ATP ATP: is the major fuel for all cell activities that require energy

Eukaryotic Cell Organelles and Function Golgi Bodies Nickname: The Post office Function: packages, modifies, and transports materials to different locations inside/outside of the cell. Appearance: stack of pancakes

Eukaryotic Cell Organelles and Function Ribosomes Nickname: “Construction Workers” Function: makes proteins Found in all cells, prokaryotic and eukaryotic

Eukaryotic Cell Organelles and Function Lysosomes: circular, but bigger than ribosomes) Nickname: “Cellular Stomach” Function: digests food into small particles the rest of the cell can use and to destroy old cells.

Plant Cell Now let’s talk about structures only found in PLANT Cells!! Figure 7-5 Plant and Animal Cells Section 7-2 Now let’s talk about structures only found in PLANT Cells!! Go to Section:

Eukaryotic Cell Organelles and Function Vacuoles Nickname: Water Tower Function: stores water This is what makes lettuce crisp When there is no water, the plant wilts Found in animal cells too, but much smaller.

Eukaryotic Cell Organelles and Function Cell Wall Nickname: The Protector Function: provides support and protection to the cell membrane Found outside the cell membrane in plant cells

Eukaryotic Cell Organelles and Function Chloroplasts Nickname: Solar Panels Function: traps energy from the sun to produce food for the plant cell Green in color because of chlorophyll, which is a green pigment

Plant vs. Animal Cells Plants Animals Cell wall Cell membrane Chloroplasts Large vacuole Animals Cell membrane No Chloroplasts Smaller vacuoles

List the three parts of the cell theory. 1______________________________ 2_______________________________ 3______________________________

Cell Theory All living things are made up of cells. Cells are the smallest working units of all living things. All cells come from preexisting cells through cell division.

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