Two sac-like structures called bursae are also located in the shoulder. The bursae secrete a lubricating fluid, which helps reduce friction between the moving parts of the joint. Together, all of these structures create one of the most flexible joints in the body.
More than half of these fatalities occur in China and India, research shows
Your child has made the big step from training wheels to a full-fledged bicycle. But is he ready for the road? Here are tips to tell whether you child is prepared:
He knows the rules of the road, and does not ride on busy highways.
He can ride straight.
He uses the brakes properly.
He knows how to swerve around hazards.
He's on a constant lookout for traffic.
His bicycle is equipped with reflectors and is in good repair.
He wears a helmet.