Examlex
The advent of the dating system signaled the end of marriage as a marker of prestige and distinction.
Muscle Contraction
The process in which muscle fibers shorten or generate tension in response to stimuli, involving the sliding of actin and myosin filaments.
Nucleus
The central and most important part of an atom, cell, or molecule, containing protons and neutrons in the case of an atom, and genetic material in the case of a cell.
Labeled Structure
An anatomical or architectural feature that has been identified and named.
Sarcomere
A sarcomere is the functional unit of a muscle fiber, comprising the filaments actin and myosin, responsible for muscle contraction.
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