Earwax in the canal. Jaw movement assists this process by dislodging debris attached to the walls of the ear canal, increasing the likelihood of its expulsion. The lubrication provided by cerumen prevents desiccation of the skin within the ear canal. The lubricative properties arise from the high lipid content of the sebum produced by the sebaceous glands. In wet-type cerumen, these lipids include cholesterol, squalene, and many long-chain fatty acids and alcohols. While studies conducted up until the 1960s found little evidence supporting antibacterial activity for cerumen, more recent studies have found that cerumen has a bactericidal effect on some strains
Alessandro Achillini body. Achillini compares what he has found during his dissections to what others like Galen and Avicenna have found and notes their similarities and differences. Achillinus states there are seven features when examining the body instead of the believed six given in Galen’s book On Sects. These seven features are size, number, location, form, substance as in thin or thick, substance as in fleshy or bony, and complexion. In this work, Achillinus also gives directions as how to proceed with certain dissections and procedures such as castration, extraction of stone, and removal of the rib cage to further examine the