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.
Animal cell vacuoles are more in number but very small. Vacuoles are membrane bound organelles. In plant cell, vacuole contains cell sap and is an important organelle that maintains turgor pressure, so that plasma membrane of plant cell is pushed against cell wall. Water and chemicals are stored in plant vacuole. Animal cell vacuoles are either generated by endocytosis or by golgi bodies for exocytosis.