A cup of lead pellets and cup of feathers both occupy 8 fl. oz. of volume. The lead will weigh a lot more than 8 ounces on a scale. The feathers will weigh a lot less than 8 ounces on a scale. 500 grams of mini marshmallows = 10 cups. 500 grams of flour = 4 cups.
The layer of the epineurium that extends within the nerve to define the fascicles is termed the internal epineurium. Together, these two layers form the epineurium, which varies in thickness along the course of a nerve. The epineurium is usually most abundant around joints, as its function is to protect the nerves from stretching and subsequent injury.
In the peripheral nervous system, nerve fibers are each wrapped in a protective sheath known as the endoneurium. These are bundled together into groups known as fascicles, each surrounded by a protective sheath known as the perineurium. Several fascicles may be in turn bundled together with a blood supply and fatty tissue within yet another sheath, the epineurium. This grouping structure is analogous to the muscular organization system of epimysium, perimysium and endomysium.