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.
Concentric contractions are the most common type of muscle contraction within the body and occur with general movement. In Eccentric contractions, the muscle develops tension whilst lengthening, to overcome a resistance, i.e. the attachments move further apart.