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Cells

Cells. Scientists have discovered that there are two different types of cells: Prokaryotic Eukaryotic. Prokaryotic Cells. Cells that do not have a nucleus or other organelles with membranes around them. Bacteria are examples of prokaryotic cells. Eukaryotic Cells.

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Cells

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  1. Cells Scientists have discovered that there are two different types of cells: Prokaryotic Eukaryotic

  2. Prokaryotic Cells Cells that do nothave a nucleus or other organelles with membranes around them. Bacteria are examples of prokaryotic cells.

  3. Eukaryotic Cells A eukaryotic cell has a nucleus and other organelles with membranes around them. Animal, plant, fungi and protista cells are eukaryotic.

  4. Cell Structure OfEukaryotic Cells Images, text and information found at: http://www.vilenski.org/science/safari/cellstructure/cellmembrane.html and google images.

  5. Cell Membrane The cell membrane is a structure that forms the outer boundary of the cell and allows only certain materials to move into and out of the cell. Food, oxygen and water move into the cell through the membrane. Waste products also leave through the membrane. The cell membrane allows only certain materials to move in and out of the cell

  6. Cell Wall The cell wall is a rigid structure outside the cell membrane that supports and protects the cell (for plants, fungi, and some protists and bacteria). The cell wall is made of tough cellulose fibers and other materials made by the cell. Note: fungal cell walls contain chitin instead of cellulose. The cell wall is a rigid structure outside the cell membrane of the cell

  7. Nucleus The largest organelle in the cytoplasm of a eukaryotic cell is usually the nucleus, a structure that directs all the activities of the cell. The nucleus is like a manager who directs everyday business for a company and passes on information to new cells. The nucleus contains genetic blueprints (Chromosomes) for the operations of the cell. https://en.wikipedia.org/wiki/Michael_Scott_(The_Office)

  8. Cytoplasm Cytoplasm is the gel-like material inside the cell membrane and outside the nucleus. Cytoplasm contains a large amount of water and many chemicals and structures that carry out the life processes in the cell. These structures that the cytoplasm contains are called organelles. Unlike a gelatin dessert, however, cytoplasm constantly moves or streams. Cytoplasm is the gel-like material inside the cell (but unlike gelatin it does flow)

  9. Mitochondria Cells require a continuous supply of energy. Mitochondria are organelles where food molecules are broken down and energy is released. The energy is then stored in other molecules that can power cell reactions easily. Just as a power plant supplies energy to a business, mitochondria release energy for the cell.  The mitochondria are where energy is released

  10. Chloroplasts Chloroplasts contain a green pigment called chlorophyll. This is what makes plants green. Chloroplasts take in sunlight, water and carbon dioxide to make oxygen and sugar (a form of food). This process is called photosynthesis.

  11. This photograph of elodea (a waterplant) has many green dots visible within the cells. These are the chloroplasts.

  12. Vacuole Remember the last vacation you took? Your suitcase temporarily stored your clothes. Within a cell, a vacuole fills a similar role as a temporary storage space for the cell. Vacuoles store water, food, pigments, waste or other materials. Vacuoles are large in plant cells and small in animal cells. Vacuoles can also be found in fungi and protists.

  13. Chromosomes • Packaged DNA in the nucleus • DNA is so long it needs to be folded in a special manner in order to fit inside the cell nucleus • The DNA is the instruction manual for the organism, controlling the actions of the cells and passing information from one generation to the next (inheritance) • This is similar to having words organized in sentences, paragraphs, and chapters in a book

  14. Lysosome • Contain digestive enzymes to break down old organelles, waste materials, and proteins into their basic parts. • This is similar to a recycling center that will repurpose and reuse the raw materials. https://c1.staticflickr.com/3/2016/2226407589_d970030802.jpg

  15. Endoplasmic Reticulum Assists in the production, processing, and transport of proteins and lipids within the cell. This is like Amazon for the cell. If another part of the cell needs a protein or lipid the ER has it and can get it delivered in a matter of moments. https://mikecanex.files.wordpress.com/2013/12/amazondrone.jpg

  16. Golgi Body • Packages and transports lipids and proteins out of the cell in a membrane. • This is similar to a UPS or FedEx store that will package and transport material beyond the city. https://c1.staticflickr.com/3/2016/2226407589_d970030802.jpg

  17. Ribosomes Make proteins by putting together chains of amino acids using instructions encoded in the cell’s DNA. Ribosomes are protein factories that use instructions from the nucleus to make organelles and structures for the cell. http://www.telegraph.co.uk/finance/newsbysector/industry/6232621/UK-car-production-falls-31.5pc-as-fears-grow-over-car-scrappage-scheme.html

  18. Cytoskeleton A network of protein filaments that gives shape and support to cells; also involved in cell division and movement This is the infrastructure of the cell, you could roughly equate this with the bones inside you, or the electrical and plumbing grid within a city . https://commons.wikimedia.org/wiki/File:Skeleton_diagram.svg

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