Health and Safety Code §691.028

(a) An adult living in this state who is of sound mind may donate the adult's body by will or other written instrument to the board, a medical or dental school, or another donee authorized by the board, to be used for the advancement of medical or forensic science. (b) To be effective, the donor must sign the will or other written instrument and it must be witnessed by two adults. The donor is not required to use a particular form or particular words in making the donation, but the will or other instrument must clearly convey the donor's intent. (c) Appointment of an administrator or executor or acquisition of a court order is not necessary before the body may be delivered under this chapter. (d) A donor may revoke a donation made under this section by executing a written instrument in a manner similar to the original donation.