They removed it from the deceased body, through the nose, using special tools.
The ancient Egyptians thought that the brain had no function (as it appeared to be just an inert lump of fat) and that the heart was responsible of thinking. During the mummification process they would get a hook and put it inside the nostril. They would break the bone between the nose and the brain. Then they would wiggle the hook and that made the Brain drain from the nose in a liquid form.
I'm just guessing but i was told it is beeswax.
A sort of long hook that was used to pull out the brain. The ancient Egyptians believed that the human brain served no purpose and was not considered as sacred as the lungs and heart, which were placed in sacred jars during the mummification process.
When Egyptians did mummification they learned about what is in the human body and found out a lot about it.
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The mummification process is not quite complete.
Mummification
By means of mummification.
Resin was used by the Egyptians as part of the mummification process. The resin was poured into the person's skull after the brain was removed to help it keep its shape. It was also used to secure bandages in place.
Egyptians believed in an afterlife so they created mummification...
The brains of mummies are typically removed during the mummification process to prevent decay and make room for preservation. The focus of mummification was on preserving the body for the afterlife rather than keeping the brain intact. Additionally, ancient Egyptians believed that the heart, not the brain, was the center of emotions and intellect.
The hook used to extract the brain during the mummification process is called a "nasal hook" or "brain hook." This tool was inserted through the nostril to reach and remove the brain, which was believed to be of little importance compared to other organs. The Egyptians typically discarded the brain, focusing instead on preserving the heart and other vital organs for the afterlife.