Single cells ... found only in the muscles that move your eyes.
The smallest functional unit of a muscle fiber is the sarcomere. Sarcomeres are composed of actin and myosin filaments arranged in a repeating pattern, allowing for muscle contraction and relaxation to occur. They are responsible for the striated appearance of skeletal muscle under a microscope.
Sacromere
myofibril
The smallest contractile unit of a muscle fiber is the sarcomere.It is composed of contractile myofilaments known as actin and myosin.
sarcomere
just take a guess of what it is.
The smallest functional andstructural unit of kidney is called as -
sarcomere
muscle fiber
The smallest unit of textile material is a fiber. The length of a fiber is greater than the diameter.
The smallest structural unit of a protein is the amino acid. The smallest functional unit of a protein is a little ambiguous, because some might consider the amino acid to be functional (after all, some can function as neurotransmitters). Or, some might consider the peptide (di, tri, etc) to be a functional unit. One could argue what exactly is the smallest functional unit of a protein.
ecosystem
Yes
A fiber
The cell