A depression or a groove found on the surface of an organ or tissue, as on the surface of the brain separating adjacent convolutions. Large sulci that divide the brain into lobes as well as the two hemispheres are more often called fissures. Plural: sulci. See fissure. calcarine sulcus See calcarine fissure.
Definition of SYNERGIST. : something (as a chemical or a muscle) that enhances the effectiveness of an active agent; broadly: either member of a synergistic pair.ADVERTISEMENT.noun synÂ·erÂ·gist \-jÉst\. something (as a chemical or a muscle) that enhances the effectiveness of an active agent; broadly: either member of a synergistic pair. ADVERTISEMENT.
Top 10 facts about the world. 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.uscle movement happens when the filaments slide across each other within the muscular bands. The sliding filament model is made possible by the interaction of the actin and myosin proteins within the filaments.