Rigor mortis is the stiffening of a person's muscles after death, which is caused when the body's metabolism stops and there is a depletion of adenosine triphosphate (ATP). ATP is needed in the ...

One question that intrigues both medical professionals and curious minds alike is: Which organ is the last to die in the human body ... Within hours, rigor mortis (muscle stiffening) sets in ...

Find out about the different stages of a human life cycle and how we change ... Discover how the food gets into the body, through the digestive system. What happens to food in your mouth?