Middle ear to sounds of higher frequency, because these are better taken up by the inner ear (which also responds to higher frequencies than those of non-mammals). The malleus, or "hammer", evolved from the articular bone of the lower jaw, and the incus, or "anvil", from the quadrate. In other vertebrates, these bones form the primary jaw joint, but the expansion of the dentary bone in mammals led to the evolution of an entirely new jaw joint, freeing up the old joint to become part of the ear. For a period of time, both jaw joints existed together, one medially and one
Cover Your Heart and the Anvil Pants Odyssey Cover Your Heart and the Anvil Pants Odyssey Cover Your Heart is a compilation album by American rock band Black Light Burns. <br> It consists of a CD ("Cover Your Heart") and a DVD ("The Anvil Pants Odyssey"), which was a professionally shot documentary of when Black Light Burns was touring for roughly a year and a half on their debut album Cruel Melody, which preceded this release. The DVD "Anvil Pants Odyssey" consists of a nearly two-hour-long documentary with the band, the music videos for "Mesopotamia," "4 Walls," and "Lie," and also features a behind the scenes look at