1. Involuntary actions like blood pressure, salivation and vomiting are controlled by the medulla.

2. The medulla oblongata, also called the medulla, is the lowest part of the brain and the lowest part of the brainstem.

3. The medulla oblongata or simply the medulla is a long stem-like structure that is part of the brain.

Methane is the gas that can cause explosions in coal mines. Methane is a highly flammable gas, and when it accumulates in high concentrations in confined spaces like coal mines, it poses a significant risk. Methane explosions can occur if the gas comes into contact with an ignition source, such as a spark or flame, leading to a dangerous explosion. That's why proper ventilation and safety measures are crucial in coal mines to prevent methane buildup and potential explosions.