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.
Family Eligibility. Adult children whose parents met USAA's eligibility requirements or previously had an auto or property insurance policy with the firm can apply for membership. Membership eligibility also applies to widows and widowers of USAA members who maintained a previous USAA auto or property insurance policy. To be eligible under a spouse or parent USAA member, you must have the family member's date of birth and Social Security number to sign up.