The ancient Egyptians mummified their deceased kings because they believed that they would go to the afterlife if the body was preserved.
The current pharaoh of Egypt had died due to an infectious disease.
Oh no! The Pharaoh has died! We must mummify him!
The priests were experts on human anatomy. As much of the brain that could be pulled out was done with iron hooks. The stomach was then slit open and the internal organs were kept in separate jars and put in the tomb with the body. The heart stayed in the body.
The body was then washed out and filled with crushed myrrh. Small bits of onions were used to replace the eyes when the body was buried.
The cut was sewn up and the body is put in natron to dry the corpse. It was then covered up for 70 days.
After the body was covered for 70 days, it was taken out and wrapped with 35 layers of linen by the priests. They were the only ones allowed to mummify. They used gum as glue to keep the linen in place.
The pharaoh's body was finally placed in his tomb.
The Egyptians did this because they believed that if the body was preserved in the real world, the dead person would live a comfortable afterlife.