Video shows what sporophyte means. A plant (or the diploid phase in its life cycle) which produces spores by meiosis in order to produce gametophytes.. Sporo...
Concentric contraction involves a shortening of the muscles under loading and is used to accelerate the body or move an object, as when you suddenly move in the opposite direction to hit the baseball.
An eccentric contraction is one of the three distinct phases in the movement of muscles and tendons, the other two are an isometric contraction (no movement), and a concentric contraction (contracting).