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Identifying Cells under the Microscope

Curriculum Outcomes Addressed: • Illustrate and explain that the cell is a living system that exhibits all of the characteristics of life ( 304-4)

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Identifying Cells under the Microscope

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  1. Curriculum Outcomes Addressed:• Illustrate and explain that the cell is a living system that exhibits all of the characteristics of life (304-4) • • Distinguish between plant and animal cells (304-5)• Explain that it is important to use proper terms when comparing plant and animal cells (109-13) Identifying Cells under the Microscope Science 8: Cells, Tissues, Organs, and Organ Systems The word cell comes from the Latin word cella, which means "small room“. http://us.123rf.com/400wm/400/400/eraxion/eraxion1006/eraxion100600408/7149016-human-cells.jpg

  2. Review: Characteristics of Living Things The cell theory consists of six characteristics of living things. Anything that has all six of these characteristics is classified as a living thing. 1. Living things are composed of ___________ 2. Living things reproduce, grow, and ________ themselves 3. Living things require ____________ 4. Living things respond to the ______________ 5. Living things have a ________________ 6. Living things produce ______________

  3. Review: Characteristics of Living Things The cell theory consists of six characteristics of living things. Anything that has all six of these characteristics is classified as a living thing. 1. Living things are composed of cells 2. Living things reproduce, grow, and repair themselves 3. Living things require energy 4. Living things respond to the environment 5. Living things have a life span 6. Living things produce wastes

  4. During this lesson, we will… • Learn about the differences between plant and animal cells in more detail (cell size, shape, and organelles) • View examples of plant and animal cells and their organelles when magnified under a microscope • Practice identifying microscopic images of plant and animal cells • Continue to become familiar with the terminology used when talking/writing about cells and their organelles

  5. Plant vs. Animal Cells • There are a number of differences between plant and animal cells that can be seen when they are viewed under a microscope • Can you think of any?

  6. Plant vs. Animal Cells • There are a number of differences between plant and animal cells when they are viewed under a microscope • Cell size and shape of animal and plant cells differ • Some organelles are found only in one cell type, but not in both (cell wall and chloroplast in plant cells; flagellum and cilia in animal cells) • Some shared organelles have different sizes and numbers in plant cells compared to animal cells

  7. Plant vs. Animal Cells under the Microscope There are some visual differences between cell types…

  8. Cell size and shape differences between plant and animal cells - Plant cells are usually larger than animal cells - Plant cells are rectangular; animal cells are circularPlant cell at 400X magnification Animal cell at 400X magnification(Frog blood cells – stained purple) http://www.danacode.co.il/thecel/cel1/ELODIA400.jpg

  9. Organelle differences between plant and animal cellsPlant cell at 400X magnification Animal cell at 1000X magnification - Large central vacuole - Smaller vacuoles throughout - Chloroplast - No chloroplast - Thick outer cell wall - No thick outer cell wall http://www.franklin.k12.ma.us/~allenc/014E2A6A-0066418D.16/vacuole--plant0.jpg http://ars.els-cdn.com/content/image/1-s2.0-S1434461011001258-gr14.jpg

  10. Plant vs. Animal Cells Some organelles are not found in both types of cells…

  11. Some organelles are not found in both types of cells

  12. Mitochondrion Organelles Under the Microscope Golgi Body and Lysosomes Nucleus, Nucleolus, and Chromosomes http://faculty.une.edu/com/abell/histo/golgilys.jpg http://biology.unm.edu/ccouncil/Biology_124/Images/mitochondria.bmp Roughand Smooth Endoplasmic Reticulum http://iws.collin.edu/biopage/faculty/mcculloch/1406/outlines/chapter%207/animalcell2.jpg http://www.zoology.ubc.ca/~berger/b200sample/unit_8_protein_processing/images_unit8/0_300_er.jpg

  13. Helpful Resources • Interactive 3D Cell and Organelles: http://www.cellsalive.com/cells/3dcell.htm • Differences between Plant and Animal Cells in more detail: http://www.diffen.com/difference/Animal_Cell_vs_Plant_Cell • Cell Structures and Functions (detailed presentation): http://www2.hoover.k12.al.us/schools/hhsfc/teachers/dwalker/Documents/Cell%20Organelles.pdf • Plant and Animal Cell Online Practice Quiz: http://www.quizrevolution.com/ch/a70678/go/plant_and_animal_cells_quiz

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