When you contract the attached muscles (subscapularis muscle, the supraspinatus muscle, the infraspinatus muscle, and the teres minor muscle), they pull on the tendons causing the shoulder to rotate up or down, back or front, in or out; hence the name 'rotator' cuff.
Acinonyx jubatus portrait. Â© 2007 Mark Probst. The cheetah is a big cat and is now, mainly found in southern Africa. It is known for its speed as it is able to accelerate from 0-60 miles per hour in only three seconds, and it is able to reach speeds of around 70 miles per hour (112 kilometers per hour).
The Maned Wolf. Although it is a member of the Canedae family, which contains dogs, wolves, and foxes, the maned wolf is the only species in the genus Chrysocyon. It is considered not to be a true wolf. It looks mostly like an overgrown fox with extremely long legs and a prominent crest of hair across its shoulders.