Cross bridges are structures that connect one place to another, whether it be a city, a country, or even an entire continent.

Proteins are the building blocks of life, playing crucial roles in various biological processes. Their structure and function are determined by the active sites, which are responsible for binding other molecules and mediating chemical reactions.

Muscle contraction is a crucial physiological process that allows our bodies to perform various activities. During muscle contraction, the muscles undergo a series of structural changes that enable them to generate force.