1/2 a mile
The convolutions in the cerebrum increase surface area
it depends do you mean in your stomach or stretched out if stretched out it could me as long as a school bus
it is as long as you haven't caused them to be stretched
scatterbrained
1600 km
3.27 meters
Depends on how long the slinky is...
it's as long as the distance from one end to the other, when it is stretched out.
approximately 6 metres when stretched
The a in brain has a long vowel sound.
They can be a little over 2 feet long.
Nile river