Generally, friction is the result of the resistance between two or more moving surfaces. Also speaking generally, there are no moving parts in the brain, and movement in the brainpan is not a good thing.
So, all things being normal, there is no friction in the brain.
A human liver typically weighs twice as much as a human brain.
The average human brain weighs about 3 pounds (1.4 kilograms).
10%
10 pounds for the average human
The blue whale's brain is much larger and more complex than a human's brain. It is the largest brain of any animal on Earth, but its structure and functions are different from a human's brain.
over 100000
appox 20 %
BaNaNa
A Neanderthal brain was around 10-15% larger than a modern human brain, on average.
The area of the cat's brain that is responsible for emotions is very similar to that area of a human's brain. Much more so than a dog's.
a human only uses 30% of the brain
a dogs brain is a brain of a 3 year old so they don't remember as much as we do.