Rotation is the act of raising the nose of an aircraft (by pulling back slightly on the control yoke or stick) during the take-off roll, so that it leaves the runway. Rotation allows for a precise, positive departure from the runway.
Crenation is the loss of water from an animal cell due to osmosis. Lysis is the rupture of the cell wall due to too much water moving into an animal cell due to osmosis. Both â¦crenation and lysis have drastic effects on the animal cell.
Subcutaneous Emphysema Causes. One of the basic causes of subcutaneous crepitation is the seepage of air through the lacerations on skin caused by stabbing, blunt trauma or bullet wounds. Due to the muscular movements the air is readily drawn in and rapidly spreads to the neck and chest cavity.