In ancient Egyptian mummification practices, it is a common misconception that the brains of the deceased were stored in canopic jars. In reality, the Egyptians typically removed the brain during the embalming process, but it was not preserved or placed in a canopic jar like the other organs.
According to ancient Egyptian beliefs, the heart was considered the seat of intelligence and emotion, so it was the heart that was left in the body to be judged in the afterlife. The four canopic jars were used to contain the other vital organs: the lungs, stomach, intestines, and liver. Each jar was guarded by a specific deity, ensuring the organs would be protected for the journey to the afterlife.
In summary, while canopic jars played a vital role in ancient Egyptian burial rituals, they did not contain the brain as one might think.