He is all muscles, just like a meathead.

The activity of brain cells directly affects our thoughts and actions.

He is researching the functions of the midbrain.

He collapsed from a stroke.

Neuroscientists are deeply studying the structure and function of the gyrus.

They began preparations to siege the castle.

They besieged the enemy's castle.

He recognizes the importance of oral history.

Aspergillus is an indispensable fungus in Japanese sake brewing.

Aspergillus plays an important role in the production of traditional Japanese food.