GLAND, I can be found in specific places in the body. When I am stimulated, I can secrete a lot of materials., MUSCLES, I can cause your knee to jerk on your arm to flex or stretch. Who am I?, SPINAL CORD, I am the long and soft organ enclosed in your vertebral column. My sides are highly branched and my branches are scattered throughout your entire body., BRAIN, I can be found on the top most part of your body. I direct all your body activities. I can make you run or stop from running., STIMULUS, I am the reason why you react. When any part of your body comes in contact with me, you are irritated..

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