Which of the following is NOT a component of the meninges?

The correct answer is C, as the medulla is not a component of the meninges. The meninges are the protective membranes that cover the brain and spinal cord, consisting of three layers: the dura mater (the outermost layer), the arachnoid (the middle layer), and the pia mater (the innermost layer). Each of these layers has specific roles in protecting the central nervous system, including supporting blood vessels and acting as barriers to infection. The medulla, on the other hand, is part of the brainstem and is responsible for regulating vital body functions such as heartbeat and breathing. Understanding the distinction between the components of the meninges and other brain structures is important in neuroanatomy and in the assessment and care of individuals with brain injuries.