Here is Number 7:
Usually, a victim would be taken to the top of a great pyramid and laid down over a sacrificial stone. A priest would stand over him, holding a knife with a blade of volcanic glass. That blade would come down upon the victim’s chest and break it open, and the priest would tear out his still-beating heart.
The priest would hold the heart up high for all to see. Then he would dash it to pieces against the sacrificial stone. The lifeless body would be rolled down the steps of the pyramid, where butchers were waiting below to dismember the body piece by piece.
The skull would be removed and placed on a rack along with the skulls of the other sacrificed dead. Then the flesh from the body would be cooked into meals and fed to the nobles.
And Number 5:
Not every sacrifice was normal. There were exceptional times when things were done differently. Sometimes, the methods were different. Other times, the difference was the sheer volume.
The greatest was during the reconsecration of the Great Pyramid of Tenochtitlan. The Aztecs had spent years building up the temples in their capital city, and in 1487, the Great Pyramid was complete. They held a massive celebration to inaugurate their great temple—and slaughtered an incredible number of people.
The Aztecs claimed that they sacrificed 84,000 people over a period of four days. During the reign of the Aztecs, an estimated 250,000 people were sacrificed across Mexico during an average year.