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STARTER true false true true true true True or False
Cells are the building blocks of all living things Plant and animals have the same type of cells The largest human cell is an ova (egg) The nucleus controls the cells activities All cells have a cell membrane Light microscopes can be used to see cells true false true true true true
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Cell Structure & Function
VIDEO Cell Structure & Function
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Robert Hook (1665) Englishman Looked at a cork tree in a microscope
Thought they looked like monk cells Hooke coined the term cells for describing biological organisms Thought cells only existed in plants
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Anton van Leeuwenhoek (1660’S)
was the first to see and describe bacteria (1674), yeast plants, the teeming life in a drop of water Was the “father of microbiology” using the microscope to discover many wonders. the circulation in capillaries
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This protist found in a drop of pond water
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Definition of Cells A cell is the smallest unit that is capable of performing life functions.
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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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US In an organism as complex as a human, there is no way you we could do everything we do and be just a single cell. We must have many different, and many different kinds of cells. different organisms have different types of cells. Trees have different cells than us and so do dogs and cockroaches.
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Examples of Cells Amoeba Proteus Plant Stem Bacteria Red Blood Cell
Nerve Cell
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Prokaryotic Eukaryotic
Two Types of Cells Prokaryotic Eukaryotic
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Prokaryotic (pro-care-ee-ohts)
Do not have structures surrounded by membranes Few internal structures One-celled organisms, Archaebacteria and Eubacteria
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Eukaryotic (you-care-ee-othts)
Contain nucleus and organelles surrounded by membranes Most living organisms These cells have a nucleus. “Eu” “you” Plant Animal
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“Typical” Animal Cell
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“Typical” Plant Cell
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Micro-journey to the plant cell
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ISA: results animal cells plant cells
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Cell Parts Organelles
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Surrounding the Cell
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Cell Membrane Gate-keeper
Outer membrane of cell that controls movement in and out of the cell Double layer
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Cell Wall Most commonly found in plant cells & bacteria
Supports & protects cells Gives plant cells their shape
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Inside the Cell
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Nucleus Directs cell activities
Separated from cytoplasm by nuclear membrane Contains genetic material – DNA THE BOSS
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Cytoplasm Gel-like mixture Surrounded by cell membrane
Suspends cells structures and organelles cYtoplasm – jellY like substance…..both have a Y
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Vacuoles Membrane-bound sacs for storage, digestion, and waste removal
Contains water solution Help plants maintain shape Vacuuming Vacuoles
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Mighty Mitochondria Produces energy through chemical reactions – breaking down fats & carbohydrates Controls level of water and other materials in cell Recycles and decomposes proteins, fats, and carbohydrates POWERHOUSE
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Chloroplast Usually found in plant cells can be found in bacteria and protist cells Contains green chlorophyll Where photosynthesis takes place ONLY IN PLANT CELLS
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Animal cells
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Plant cells
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