To protect them from ultraviolet rays from the sun.
<span>Infection is the term used to describe the process through microorganisms that cause diseases. The invasion of a host by a pathogenic microorganism multiplies in the tissues and the reaction of the host to its presence and to its possible toxins and can be caused by bacteria, fungi, viruses, protozoa or prions.</span>
75% is my answer! I hope you get it right!
So it could fit perfectly.
The kidneys are a pair of bean-shaped organs on each side of your spine<span>, under your ribs and behind your belly. Each kidney is about
4 or 5 inches long, roughly the size of a large fist. It goes to the
kidneys to extract water from the excretory system and put it back into the blood.
Kidneys filter your blood. They eliminate wastes, control the body's fluid
balance, and hang onto the right levels of electrolytes.
All of the blood in your body passes through them quite a few times a day.</span>
