1 vote Vote for this answer. The dreaded 'more information than you need'. Percentage of water making up tissues, organs, fluids and bone in the human body: Brain 75%, Heart 75%, Lungs 86%, Muscle 75%, Liver 85%, Kidney 83%, Bone 22%, Blood 83%, Saliva 95%, Perspiration 95%. http://www.sumeria.net/oxy/o3.html.
If you are a resident of Mexico or Canada or a national of the United States, you can also claim a personal exemption for your spouse if your spouse had no gross income for U.S. tax purposes and was not the dependent of another taxpayer. In addition, you can claim exemptions for your dependents who meet certain tests.
There are five tests to determine whether you can claim a parent as a dependent: The person you are claiming as a dependent must be related to you. This shouldn't be a problem if you are claiming a parent (in-laws and stepparents are also allowed). Keep in mind, however, that foster parents do not count as a relative. To claim a foster parent, he or she must live with you for a year as a member of your household.