Henry Jones Shrapnell tympanic membrane is known as "Shrapnell's membrane". During the same year, Shrapnell published two other articles in the same journal, these being in regards to the function of the tympanic membrane and the nerves of the ear. In 1833, he published an article (again in the same journal) on the anatomy of the incus. Henry Jones Shrapnell Henry Jones Shrapnell (1792–1834) was an English anatomist. For a period of time during his career he was a colleague to Edward Jenner (1749-1823), creator of the vaccine for smallpox. Shrapnell is remembered for his pioneer work in otology. He was the first
Semipermeable membrane the rate and the permeability. Many natural and synthetic materials thicker than a membrane are also semipermeable. One example of this is the thin film on the inside of the egg. Note that a semipermeable membrane is not the same as a selectively permeable membrane. Semipermeable membrane describes a membrane that allows some particles to pass through (by size), whereas the selectively permeable membrane "chooses" what passes through (size is not a factor). An example of a biological semi-permeable membrane is the lipid bilayer, on which is based on the plasma membrane that surrounds all biological cells. A group of