What is the difference of rigor murtis and tetanus?

Rigor mortis and tetanus are two different physiological conditions. Rigor mortis is a postmortem change in muscle tissues that occurs after death, resulting in the stiffening of muscles due to biochemical processes. In contrast, tetanus is a condition caused by a bacterial toxin that leads to prolonged muscle contraction and spasms while the individual is still alive. Essentially, rigor mortis signifies the cessation of life, whereas tetanus is a life-threatening infection affecting muscle function.