Lenz's Law. Lenz's Law - seeing that the magnetic field induced by a current induced by a change in magnetic flux (Faraday's Law) counteracts the change in flux.
The brain is protected from injury by the skull, meninges, cerebrospinal fluid and the blood-brain barrier. In this post we will explore them all in detail, well, except for the skull since that was already discussed in other posts about the bones. The function of the meninges is to cover and protect the brain itself. It encloses and protects the vessels that supply the brain and contains CSF between the pia mater and arachnoid maters. Immediately deep to the periosteum is the periosteal and meningeal which create the dura mater. The dura mater is found all around the brain and its 2 layers separate and create spaces called dural sinuses.
From outermost to innermost, Meninges around the brain has three layers : 1. The dura mater 2. the arachnoid mater and 3. the pia mater. The dura mater has two layers : periosteal and meningeal. There is a space between the dura mater and the arachnoid mater, called subdural space. There is also a space between the arachnoid and the pia mater, which is called subarachnoid space. Following diagram shows different layers of the meninges and their order around brain :