The modern definition of death is: The brain is among the largest organs in the body, weighing about: The brain contains: The outer and toughest covering of the brain is the: The middle layer of the meninges is called the: The innermost layer of the meninges is called the: A subdural hematoma is: An epidural hematoma is: A subarachnoid hematoma is: The ventricles of the brain are reservoirs of: Two lateral ventricles of the brain are located in the: Vertebral arteries join in the head to form the: The brain stem connects the spinal cord to the: Pons are fibers connecting the right and left sides of the: Motor and sensory nerves cross sides in the: Thirst and hunger responses are regulated by the: