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.
What are two structures are found in plant cells and not animal cells? The large vacuole in a plant cell is an organelle that the animal cell doesnt have. the same thing with chloraplast and the plant cells wall. The animal cell has a membrane toâ¦ keep things in and keep things out but that is what a cell wall is for in a plant cell.