Vermiform Appendix
in comparative anatomy, appendix cæci vermiformis. So far as is known, this appendage is peculiar to man, certain of the higher apes, and the wombat. The vermiform appendage in the human species hangs from the cæcum, which is the point of junction between the smaller intestines and the ascending colon. In size and shape it resembles a man's little finger.
Its lining membrane secretes a mucus which in health constantly wells up into the lower end of the colon where the ileocæcal valve opens, and this mucus acts as a lubricant to the valve. Sometimes the appendix becomes ingested with fæcal matter and serious and even fatal inflammation results. See APPENDICITIS.