cytoskellet
Cytoskellet, or the cytoskeleton, is a dynamic network of protein filaments that extends throughout the cytoplasm of most eukaryotic cells. It provides shape and mechanical support, organizes the internal contents of the cell, and enables movement and transport at the cellular level. The cytoskeleton comprises three main filament types: microfilaments (actin filaments, about 7 nm in diameter), intermediate filaments (about 10 nm), and microtubules (about 25 nm).
Actin filaments are involved in cell motility, changes in cell shape, and endocytosis and exocytosis. Intermediate
Motor proteins drive movement along the cytoskeleton. Myosin moves along actin filaments, powering muscle contraction and
Organizational centers include microtubule organizing centers, such as the centrosome in many animal cells, which nucleate