Final answer:
The minimum volume of arterial injection solution typically used for embalming an average adult is about 3-4 gallons, aligning with the average blood volume in adults.
Step-by-step explanation:
When embalming an average adult weighing from 125 to 175 pounds, the minimum volume of arterial injection solution typically used is about 3-4 gallons (3-4 gal). This estimation corresponds to the average amount of blood in an adult body, which is between 4.7 and 5.7 liters, and considering that blood constitutes approximately 8 percent of an adult's body weight. The answer reflects the necessary volume of embalming fluid to replace the blood and provide adequate distribution and preservation of the body tissues.