bands of smooth muscle cells connected to each hair follicle to the papillary layer of the dermis that when contracted the hair follice is pulled uprights(created goose bumps).
Common Access Card (CAC) The CAC, a smart card about the size of a credit card, is the standard identification for active duty uniformed service personnel, Selected Reserve, DoD civilian employees, and eligible contractor personnel.
The card you will be eligible for will be determined by your Sponsor, the person affiliated with the DoD or other federal agency responsible for verifying and authorizing your need for an ID card. The uses of the card depend on the component/Command that you support.