Express Action Sports

I am new, yet enthusiastic to the sport of Rygby. Still filled with questions! So tell me, how does a scrum work?

scrums are used when a violation has a occurred and whoever the the violation was made against gets to put the ball into the scrum. the scrum is shaped like 2 pyramids with their bases pushing against each other. In the front row of a scrum you have a prop then a hooker then another prop. Their names imply their actions as it is the prop’s duty to prop up the hooker while the hooker, tries to "hook" the ball back to his/her team. The second row consists of 2 "second row" players. These are generally the biggest/strongest player and are the power source of the scrum. Next to the second row players are the flankers. It is the flankers job to keep the scrum from falling apart, and it is also their duty to tackle the other scrumhalf if their team loses the scrum. Lastly there is the 8 man. It is this players duty to keep the ball on the inside of their foot until the backline is set up and the scrumhalf retrieves the ball. if you are still confused here is a picture.

http://blog.huilaaja.net/wp-content/uploads/2009/05/play_rugby_scrum01.gif

the props are #1 and 3. The hooker is #2. The second row players are #4 and 5. The flankers are #6 and 7. and the 8 man is number 8. Also the scrumhalf is #9.