flagella ,which helps in motility of organism.
type of flagella peritricous , monotricous
You shouldn't call them anything.
Microfilaments (in cytoskeleton) and thin filaments (in muscle cells) are both polymers of actin.
E. coli is a gram negative rod shaped bacteria (it is long and thin).
Some bacteria have flagella, which appearance resembles a long thin tail. They use this to move around. Others "squirm" and glide.
They are thin and wispy (look like threads).
I think it is called Sinew.
tenau is thin.
Cytoplasm
If you talk about the whip used by the ringmaster, the French call it chambriere (chambrière): A long, thin handle, and a long, thin lash, used during the Liberty Horse Act. Whips used by animal trainers (so-called "lion tamers") have no specific name to my knowledge.
chromatids
Call manes are used to protect the delicate skin underneath the Macor. It is a long thin stripe of jellyfied muscle beneath the Amior!
You call them anorexic .