For other uses, see Atrium. The atrium (plural: atria) is a blood collection chamber of the heart. It was previously called the auricle, and that term is still used to describe this chamber in, for example, the Mollusca, but in humans that name is now used for an appendage of the atrium.
1 Adult children whose eligible parents have or had a USAA auto or property insurance product.*. 2  Widows and widowers of USAA members who have or had a USAA auto or property insurance policy. * Children must be 18 years or older to be eligible for USAA membership and purchase products in their own name.
Updated February 26, 2017. If you are a member of the U.S. Military, you have undoubtedly heard of USAA Insurance. USAA (United Services Automobile Association) is an insurance company serving members of the U.S. Military with insurance banking, investment, retirement planning and financial counseling services. For service men and women and their families, the company offers many attractive benefits to its members.