The meninges (from the Greek meninx, meaning membrane) cover and protect the brain and spinal cord. The meninges have three layers: 1) the dura mater, 2) the arachnoid, and â¦ 3) the pia mater. The dura mater is the outermost layer covering the central nervous system.he innermost layer of the meninges is the pia mater. The pia mater is firmly attached to the neural tissue of the spinal cord and brain. Cerebrospinal fluid fills the space between the pia matter and the arachnoid membrane. Most of the blood vessels that supply blood to the central nervous system are in the pia mater.
According to Aristotle, tragedy has six main elements: plot, character, diction, thought, spectacle (scenic effect), and song (music), of which the first two are primary.
In the wake of Aristotle's Poetics (335 BCE), tragedy has been used to make genre distinctions, whether at the scale of poetry in general (where the tragic divides against epic and lyric) or at the scale of the drama (where tragedy is opposed to comedy). For a work to be tragic, it need not have a tragic ending. 2  Although Aristotle says that catharsis (purgation of emotion) should be the goal of tragedy, this is only an ideal. 3  In conformity with the moral codes of the period, plays should not show evil being rewarded or nobility being degraded.