Answer:
The short term effects of stress include pain, nausea, change in appetite, heartburn, constipation, and in some cases, diarrhea. 
Long term effect of stress on the body and behavior include changes in one's eating habits and chronic pain. Another long-term effect of stress is acid flux.
Asides having negative effect on the body and behavior, stress can also have some negative effect on the brain such as increasing the risk of developing mental illness, killing of the cells in the brain, brain shrink, and it can hurt one's memory.
Explanation:
 
        
             
        
        
        
I believe it is a Pure Substance
        
             
        
        
        
They move blood through out your body
        
             
        
        
        
Answer:
nucleus, ribosomes
Explanation:
DNA, and the instructions that are used for making proteins are all found in the nucleus. The nucleus witholds the majority of the cell's genetic material. Ribosomes do protein synthesis and are located on the rough endoplasmic reticulum.