Brain vessels enter the central nervous system through holes in the meningeal layers. The cells in the blood vessel walls are joined tightly to one another, forming the blood–brain barrier, which blocks the passage of many toxins and pathogens (though at the same time blocking antibodies and some drugs, thereby presenting special challenges in treatment of diseases of the brain). Neuroanatomists usually divide the vertebrate brain into six main regions: the telencephalon (cerebral hemispheres), diencephalon (thalamus and hypothalamus), mesencephalon (midbrain), cerebellum, pons, and medulla oblongata. Each of these areas has a complex internal structure. Some parts, such as the cerebral cortex
If We Are the Body rich over the poor". "If We Are the Body" was produced by Mark A. Miller and Steven Curtis Chapman. It was recorded at Glow In The Dark Studio in Decatur, Georgia and Zoo Studio in Franklin, Tennessee. The song was engineered by Matt Goldman and Sam Hewitt. "If We Are the Body" is a song with a length of three minutes and 58 seconds. It is set in common time in the key of F minor and has a tempo of 126 beats per minute. Mark Hall's vocal range in the song spans from the low note of B to