Cell Structure & Function 02/03/20 4 Definition of Cell A cell is the smallest unit that is
capable of performing life functions. Cell Theory (Teora) 1. All living things are made up of cells. 2. Cells are the smallest working units of all living things. 3. All complex cells come from preexisting cells through cell division.
Two Major Types of Cells Prokaryotic- simple cells Eukaryotic- complex (complejo) cells Most living things you are familiar with (including humans) have eukaryotic cells. Prokaryotic Do not have a
nucleus or other organelles One-celled organisms, bacteria, etc. Bacteria cell in the process of reproducing (dividing)
Eukaryotic Contain a nucleus and other organelles (smaller parts) surrounded by membranes Most living organisms have these type of cells Plant cell Animal cell
Prokaryote vs. Eukaryote Prokaryote: -has no organelles (no nucleus) Both: -are living -have
DNA -are cells Eukaryote: -has organelles (has a nucleus) Typical Animal Cell
Typical Plant Cell Cell Parts Organelles: little organs Think of a cell as a factory- lots of separate people, departments, and machines that each have their own task, but they work together to get a job done. Surrounding the Cell
Cell Membrane Cell Membrane (like factory doors and gates): surround the cell provide communication with other cells control entrance and exit of materials, thereby
maintaining internal balance Cell Wall (plants only) Cell Wall (like factory outer walls): further protects the cell and provides strength
Inside the Cell Nucleus Cell nucleus (like the factory central office): the boss of the cell Directs all cell activities Separated by a nuclear membrane (its own cell
wall) Contains genetic material DNA Cytoplasm Cytoplasm (like the factory floor): contains and carries all other organelles Gel-like material; the
goop of the cell Endoplasmic Reticulum Endoplasmic reticulum (like factory conveyor belts): move materials around in cell Smooth type: has no ribosomes
Rough type (pictured): has ribosomes in surface Ribosomes Ribosomes (like the factory assembly line): put together proteins Each cell contains thousands
Found on reticulum and floating throughout the cell Mitochondria Mitochondria (like the factory generator): the power plant of the cell Produces energy through
chemical reactions breaking down fats & carbohydrates Golgi Bodies (Apparatus) Golgi bodies (like the factory packing and shipping department): the UPS or Fed-Ex of the cell
Transports and packages proteins and other materials in the cell Moves materials within the cell Moves materials out of the cell Lysosome
Lysosomes (like the factory waste management dpartment): the wrecking crew and trash can of the cell Transports undigested material to cell membrane for removal Cell breaks down if
lysosome explodes or ruptures Vacuoles Vacuoles (like factory storage/factory water tower): the storage container of the cell Sacs for storage,
digestion, and waste removal Help plants maintain shape- very large in plants Chloroplast (plants only) Chloroplasts (like factory solar energy plants):
turns energy from the sun (with CO2 and water) into food Contains green chlorophyll Where photosynthesis takes place Todays Assignment
Cell Analogy Project (cell structures) How about an example? Your cell analogy can be a factory, a store, a school, a garage.
You may choose a plant or animal cell 100 pts possible
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