Wax has been injected into the arteries, veins and muscles to preserve the internal structure of the hand. This technique was perfected by Frederik Ruysch (1638-1731), a Dutch anatomist. The wax injection highlights the blood vessels that otherwise would be difficult to distinguish. Anatomical preparations such as this one were useful in an age when there was a lack of bodies available for dissecting. This arm may have been used as a teaching aid for medical students.