In Table 3-1, the size of water-conducting vessel cells in oak are______________ _ _______________________. Each millimeter contains 1,000 μm. Approximately how many of these cells could be laid end to end (or side by side) in 1 mm? Do you think such a cell would be visible if it were placed in your hand? How long are the fiber cells in hemp? How long is this in millimeters? How long is it in centimeters (1 cm = 10 mm)? Could you see one of these cells if it were in your hand?

Table 3-1

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TABLE 3-1 Examples of Plant Cell Shapes and Sizes Cell Shape Cube Dividing cell in shoot or root Epidermal cell of lily (Lilium) Photosynthetic cell in leaf of pear (Pyrus) Water-conducting vessel cell in oak (Quercus) Fiber cell in hemp (Cannabis) Flat, paving stone Short cylinder Short cylinder Long cylinder Dimensions 12 μm x 12 μm x 12 μm 45 μm x 143 μm x 15 µm 7.4 μm diam x 55 µm 270 μm diam × 225 um 20 μm diam x 60,000 μm