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.
&#160 Dichomorpha echmepterygis is the smallest of the small.&#160 Discovered in 1997, this Costa Rican wasp (family Mymaridae) is a parasite of other insects' eggs.&#160 Adult males may be only 0.139 mm (0.00055 inch) in length -- nearly 1/3 smaller than some single-celled protozoa (e.g., Paramecium caudatum).