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.
Plant and animal cells are different.Animal cells have 5  parts.    Nucleus  Cytoplasm  Mitochondria  Vacuoles  Cell membrane   1. Nucleus is like a person's bra â¦ in.it tells the cell how to do  it's job.   2. The cell membrane is like the skin.It lets things is and out of  the cell.   3. Vacuoles store water for the cell.they also store waste  products.   4. Cytoplasm is like water or liquid and fills the inside of the  cell.it holds the other parts of the cell in place.   5.