DISPOSAL OP CARCASS : After the experiment with an animal is over, the dead animal, i.e. carcass should not be left in the laboratory. The dead animals start decaying and putrefying by invasion of microbes and this leads to contamination and foul odour in the lab. The carcass may be of two types: (1) untreated animals (2) radioactive-treated animals. You must take care to wear apron and gloves while handling dead animals especially the ones treated with radioactive material. As said earlier this activity is a demonstration activity.