according to your reading, the first noticeable change after death is the natural thermoregulation of the body stops, which is know as Algor Mortis.
Algor Mortis is the process of cooling the body after death. Blood circulation keeps the body temperature normal. When the heart ceases beating, circulation stops and the body cools. Normal body temperatures vary, but are thought to be around 98.6 degrees Fahrenheit on average (37 oC).
The postmortem refrigeration of body temperature until it normalizes the temperature of the surrounding environment is known as algor mortis. When represented graphically, the rate of cooling initially lags, then becomes linear prior to actually decelerating again as it reaches the ambient temperature, resulting in a sigmoid-shaped curve.
For more information on Algor Mortis, visit :
https://brainly.com/question/8634179
#SPJ4
