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.
In a plant cell the vacuole is much larger than the animal cells vacuole. The plant cells vacuole mostly contains water. In the animal cells vacuole it is used to store waste. â¦ Animal cells do not have vacuoles. Only plant cells