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 plant cells, when viewed under a microscope, appear very different from animal cells because of the presence of a large vacuole, which exists in the cellâs cytoplasm. It usually takes up most of the room in the cell, and the membrane of the cell encircles it.