When there is no measurable activity in the brain and the brainstem, this is called brain death. In a person who has been declared brain dead, removal of breathing devices will result in cessation of breathing and eventual heart failure. Brain death is considered irreversible.
The functional unit of a skeletal muscle is called a sarcomere. Hole's Anatomy 12th edition, pg 287 states: Muscle fibers, and in a way muscles themselves, are basically collections of sarcomeres, discussed later in this chapter as the functional units of muscle contraction.. sarcomere. Tina Wright.
These 10 animal facts will amaze you. A sarcomere is the basic functional unit of striated muscle, which is to say, itâs the basic building block of most muscle cells. In the human body, each muscle is made up of multiple bundles of muscle fibers. These muscle fibers, in turn, are comprised of numerous finer strands called myofibrils.