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.
molecules; plant cells tend to have one large vacuole; animal cells may have several smaller vacuoles Jtoskeletoncy filaments and tubules that provide a framework for the cell, helping