Relative to body size, humans.
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.
my brothers brain
your brain
3inches
The smallest part of the brain is the brainstem, located at the base of the brain. It connects the brain to the spinal cord and is responsible for basic life functions like breathing, heart rate, and digestion.
The Heart
The animal with the smallest brain relative to its body size is the Etruscan shrew. Despite its tiny size, its brain makes up about 10% of its body mass.
The name of the smallest cell in the brain is a neuron. Neurons are specialized cells that transmit information throughout the nervous system.
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.