HORTICULTURE

Detailed explanation-1: -The process of rigor mortis uniformly involves all muscles of the body. However, it is first apparent generally in smaller muscles such as the jaw and the eyelids due to quicker depletion of ATP relative to larger muscles in the trunk and limbs.

Detailed explanation-2: -Depending on the circumstances, rigor mortis may last for a few hours to several days. The muscles of the face and neck are often the first to be affected and the rigidity spreads backwards over the trunk and limbs. Relaxation of the muscles occurs in roughly the same order.

Detailed explanation-3: -Rigor mortis is a postmortem change resulting in the stiffening of the body muscles due to chemical changes in their myofibrils. Rigor mortis helps in estimating the time since death as well to ascertain if the body had been moved after death.

Detailed explanation-4: -The rigor mortis can be divided into four main stages: autolysis, bloat, active decay, and skeletonization.