Relative to body size, humans.
the person (can be yourself) who told you to type this question!
The smallest brain weighed only 24 pounds.
the smallest dinosaur is a stegosaurus with a 2.5 once brain
I am just guessing here but I believe that the dog with the smallest brain is a yorkie
The animal which is said to have the smallest brain is the green lizard. The green lizard's brain is said to weigh about 0.08 grams and is about five inches long and is commonly found in rocks, lawns and bushes.
your brain
my brothers brain
3inches
The habenular nuclei is one of the smaller specific regions of the brain
The smallest unit of the brain is the neuron (nerve cell). It is the cell that forms larger nerves and neural tissue...which is then integrated together to form the modular systems of the brain.
The Heart
Bee hummingbird
Granule cell