In case repeated blood samples are required at short intervals, a maximum of 0.6 ml/kg/day or 1.0% of an animal's total blood volume can be removed every 24 hours. The estimated blood volume in adult animals is 55 to 70 ml/kg body weight.
Four special teams units exist: 1  The group of players that handles punts, kickoffs, and punt returns. 2  The unit that handles field goal and extra point attempts. 3  The group that takes care of kickoff returns. 4  The unit that attempts to block field goal and extra point attempts.
In the NFL, each team elects a captain (either by vote of the players or appointed by the coaching staff) from the offense, defense and special teams based on leadership on and off the field. In the NCAA, most schools have three team captains but this varies from school to school and the responsibilities of the captain are the same as in the NFL. During special event games such as the Super Bowl or a BCS Bowl, schools will often bring in former players or VIP's from the school to serve as honorary team captains.