What are the three layers of the meninges?

The three layers of the meninges are indeed the dura mater, arachnoid mater, and pia mater. These layers serve critical protective and supportive roles for the brain and spinal cord.

The dura mater is the outermost layer, which is tough and provides a strong protective barrier. It is composed of dense connective tissue and helps anchor the brain and spinal cord within the skull and vertebral canal, respectively.

The arachnoid mater is the middle layer, which is web-like in appearance. It allows for the passage of blood vessels and is situated between the dura mater and the pia mater. It also creates a space known as the subarachnoid space, which contains cerebrospinal fluid that cushions the brain and spinal cord.

Lastly, the pia mater is the innermost layer, which closely adheres to the surface of the brain and spinal cord. It is thin and delicate, providing a barrier for the underlying neural tissue while allowing for blood vessels to penetrate and nourish the brain and spinal cord.

In contrast, the other options do not accurately represent the layers of the meninges. For example, the second option includes the aorta and skull, which are not part of the meninges at all. Similarly, the third