Explain why all chemicals in the lab should be considered dangerous.

It is better to assume the risk than assume it is safe when it may not be.

Explanation: There are a lot of chemicals that naturally behave like water; particularly some acids. They may look like water, but can be extremely dangerous when touched or consumed. Thus, it is safer to assume that all chemicals are dangerous and handle them as such.

the abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. the region occupied by the abdomen is termed the abdominal cavity. the stomach secretes acid and enzymes that digest food. ridges of muscle tissue called rugae line the stomach. the stomach muscles contract periodically, churning food to enhance digestion. the pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.