3 & usually 1-2 hours , hope this helps some !
To protect their shins from getting hit
Oh there have been plenty.
STI's for example including HIV (human Immunodeficiency virus) has definitely boosted the awareness of caution and avoiding risky behaviors in both sexual terms and reducing exposure to bodily fluid via blood in work, or IVDA (intravenous drug abuse) needle sharing.
Additionally potentially dangerous and very infectious diseases like the Flu have put an emphasis on the very basic disease prevention of washing ones hands, covering your sneezes, wearing face masks during exposure, and getting vaccinated as well.
And these are merely two examples of how hundreds of disease shaped out infection control protocols and norms.
<span>The axial skeleton is composed of all the bones that make up the axis of the body, namely the 22 bones of the skull, all the vertebrae. The axial skeleton also includes the rib cage consisting of the sternum forward and ribs laterally.
The appendicular skeleton designates the 206 bones that comprise the human body, the 126 that make up the upper and lower limbs and bone belts (shoulder bone or shoulder girdle and hip bones or pelvic girdle). It consists of the clavicles, shoulder blades, humerus, radius, ulna, all the carpal bones (hands and wrists), pelvic bones, femur, tibia, fibula and all bones ankle and foot. All these bones are bilateral (the one on the left and <span>right).</span></span>
