Overs:

The set of six fair deliveries is known as over. This name came about because the umpire calls "Over!" when six balls have been bowled. At this point, another bowler is deployed at the other end, and the fielding side changes ends while the batsmen do not. A bowler cannot bowl two successive overs, although a bowler can (and usually does) bowl alternate overs, from the same end, for several overs. The batsmen do not change ends at the end of the over, and so the one who was non-striker is now the striker and vice versa. The umpires also change positions so that the one who was at square leg now stands behind the wicket at the non-striker's end and vice versa.

The only occasion where one bowler bowls consecutive overs is in the Super Over directly after the final over of a tied game of a limited-overs match

Team Structure:

A team consists of eleven players. Depending on his or her primary skills, a player may be classified as a batsman or bowler. A well-balanced team usually has five or six specialist batsmen and four or five specialist bowlers. Teams nearly always include a specialist wicket keeper because of the importance of this fielding position. Each team is headed by a captain who is responsible for making tactical decisions such as determining the batting order, the placement of fielders and the rotation of bowlers. A player who excels in both batting and bowling is known as an all rounder. One who excels as a batsman and wicket-keeper is known as a "wicket-keeper/batsman", sometimes regarded as a type of all-rounder. True all-rounders are rare as most players focus on either batting or bowling skills.