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.
A vacuole is a large storage area that holds food, water, and wastes. Vacuoles are found in both animal and plant cells. A plant cell usually has only 1 large vacuole that takes up much of the space inside the cell. In animal cells the vacuoles are much smaller.