What is the job three meninges (membranes) that cover brain?

The three meninges that cover the brain are the dura mater, arachnoid mater, and pia mater. They work together to protect the brain from injury and infection.

* Dura mater: The dura mater is the toughest and outermost layer of the meninges. It is made of dense connective tissue and lines the inside of the skull. The dura mater helps to support the brain and protect it from injury.

* Arachnoid mater: The arachnoid mater is a delicate layer of tissue that lies beneath the dura mater. It is filled with cerebrospinal fluid (CSF), which helps to cushion the brain and protect it from impact.

* Pia mater: The pia mater is the innermost layer of the meninges. It is a thin, vascular layer of tissue that closely follows the contours of the brain. The pia mater helps to nourish the brain and remove waste products.

The meninges also help to regulate the flow of CSF through the brain. CSF is a clear fluid that bathes the brain and spinal cord. It helps to protect the brain from injury and infection, and it also helps to carry nutrients to the brain and remove waste products.

The meninges are essential for the proper function of the brain. They provide protection, cushioning, and nourishment for the brain, and they help to regulate the flow of CSF.