Protective equipment is very helpful when playing sports because it minimizes the chance of getting hurt. With the protection you could still get hurt. One example of protective equipment is a helmet, it protects your head for the most part but you could still get a concussion even while wearing the helmet, but it prevents you from breaking your skull. so you would rather end up with a possible concussion instead by wearing the helmet
Physical activity is essential for healthy development and adopting physical activity habits early in life will increase the likelihood of children remaining physically active as adults. Participating in family physical activities helps children gain life skills as well as health benefits.
Your knee has a knee cap while your elbows do not. The elbow also contain less cartilage and and ligaments.
The Respiratory System brings oxygen into the blood; it is the responsibility of the Circulatory System to transport it, with nutrients from digestion, to cells of the body.
The Circulatory System is three-fold: the blood carrying the substances, the vessels in which blood flows, and the heart which pumps it around in a circle-like movement and back (hence the term 'circulatory').
In order to reduce on-the-job injuries by the use of mechanical lifting devices, plans such as Engineering Control Plans must be put into practice. Through this, physical change to the workplace, which eliminates/reduces the hazard on the job/task is being implemented.