Guide. A bone density test measures the density of minerals (such as calcium) in your bones using a special X-ray. This information is used to estimate the strength of your bones.
Animal cells do have vacuoles, but they are smaller, larger in number (plant cells usually have just one or a few large vacuoles) AND serve a somewhat different purpose than those of plants.
Also notice that the plant cell has a large vacuole while the animal cell has only a small vacuole or no v\àµ¡cuole at all! Lastly, notice that the plant cell is rectangular in shape while the animal cell is more rounded and the animal å°cell has a flagella for movement, while the plant cell does not.