The first comes from the word accord and refers to a harmonious combination of three or more musical notes. The second is an alteration of cord, taking its spelling from Greek chorda, "string, gut," by way of Latin. This is the mathematical chord—a line segment that joins two points on a curve
"Well, because without them if you would, for example, accidentally put your hand on a hot stove, your reflex would be to pull away. Without reflexes, the pain will be felt and go to the brain, then the brain will tell the hand to be removed, and then that command will go to the hand, thus removing the hand."
Answer:
I just needed some points, so thank you for being so kind and generous to give me this opportunity.
They are part of an organ system
