A popliteal cyst, also known as a Baker's cyst, is a fluid-filled swelling that causes a lump at the back of the knee.
the smallest category is species but from largest to smallest it will be: kingdom Phylum class order family genus and species and you can come up with another word for it to hâ¦elp you with it. so yeh there you go.
Leptotyphlops carlae is the world's smallest species of snake, with adults averaging just under four inches in length. Found on the Caribbean island of Barbados, the species --which is as thin as a spaghetti noodle and small enough to rest comfortably on a U.S. quarter-- was discovered by Blair Hedges.