POST LAB: Plant & Animal CELLS or - PowerPoint PPT Presentation

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POST LAB: Plant & Animal CELLS or

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  1. POST LAB: Plant & Animal CELLSor “Two Cells One World”

  2. CORK cells 100X • Cork = bark of the cork oak tree (Quercus Suber) • Cell Wall • Cork Cells are NOT ALIVE Cell Wall NO cytoplasm NO organelles CORK 450X

  3. Human Cheek Cell • Cheek cell • Squamous cell epithelium • Eukaryotic • Obvious nuclei • Cell Membrane • Cytoplasm

  4. LABELS: • Cheek Cell 100x Cheek Cell 450x Cell membrane Nucleus Cytoplasm

  5. Elodea Wet Mount • cell walls • green chloroplasts • Most slides show multiple cell layers • Shows depth by focusing to see 3-D cells

  6. Elodea Wet Mount • Regular repeating structure/arrangement of plant cell walls

  7. Elodea Wet Mount

  8. Elodea slides: Wet Mount Scanner 40x Low power 100x High 450x

  9. LABELS:

  10. Potato Wet Mount • Leucoplasts • Notice Starch granules • Cell wall • What could be done to prove that starch is present in the leucoplast?

  11. Potato Wet Mount • ADD a Stain (Iodine) • How do you know it is a STARCH? • TEST for Starch: blueblack

  12. Potato slides: Potato (leucoplasts) 40x (no stain) Potato (leucoplasts) 40x stain Potato (leucoplasts)450x Potato (leucoplasts)100x

  13. LABELS: Couch potato Cell wall Cell membrane (inside of cell wall) Starch grains Leucoplast (whole cell) that is surrounded by cell wall Potato (leucoplasts) 450X

  14. STAIN: Why Add stain?? Nucleus UNSTAINED ONION 100X STAINED ONION 100X Nucleus UNSTAINED CHEEK 100X STAINED CHEEK 450X

  15. OTHER FUN Plant cells that you always wanted to know about!

  16. Here we go>>>> Wandering JewTradescantia zebrina Celery Cell Walls Banana cells Starch granules in BEAN embryo

  17. Onion Cell 100x • Cell wall • Nucleus • Plant cells have a cell membrane inside next to cell wall (cellulose)

  18. Chromoplasts: Color =Vitamins/attraction Red Bell pepper Green Bell pepper Chromoplasts Nucleus Marigolds

  19. Onion Cell 400x (notice nuclei) 450X 450X

  20. The PEAR: What is the grit in a pear? Cell wall 450x Stone cells (sclerids) High power 450X 450x stained

  21. In Honor of the Louisiana Heritage: Tabasco Sauce • Avery Island, Louisiana, USA. Chromoplasts Cell Wall Tabasco peppers

  22. Plant Cells: From Chloroplasts (green) to Chromoplasts (ripe)

  23. Comparing Plant/Animal Cells • Plant cells are like animal cells, except for 3 differences: • Large Vacuole • Cell Wall • Plastids: Chloroplast Chromoplast Leucoplast chloroplast

  24. Comparing Animal & Plant cells • Cell membrane • Centrioles (cell division) • Small Vacuoles Cell membranes allow animals to be FLEXIBLE / MOBILE Cell walls give plants STRENGTH / SUPPORT.

  25. Animal Cells: Human Blood • Notice human red blood cells have no nucleus • White cells are purple stained. Notice the difference in the shape of white cell nuclei

  26. Animal Cells: Frog’s Blood • Both red cells (erythrocytes) & white cells (leukocytes) • Frog red cells have a nucleus • White cells are dark purple staining

  27. Bacteria Slide 400x (gram stain) • extremely small • prokaryotes • lack membrane bound organelles & nucleus • multiply rapidly

  28. Henry Dutrohet 1824“---all living things are composed of cells.”