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.
ORDER MICROBIOTHERIA. MENU - MICROBIOTHERIA. The Microbiotheria order is represented by 1 Recent family containing 1 genus and 1 species. This species, Dromiciops australis, has the smallest distribution of any extant mammalian order. They are only found in south central Chile from Concepcion south to Chiloe Island, and east to mountain ranges just past the border with Argentina.