What is the function of actin in humans and how does it contribute to cellular processes?

Actin is a protein that plays a crucial role in various cellular processes in humans. It is involved in cell movement, cell division, and maintaining cell shape. Actin forms the structural framework of the cell and helps in the transportation of molecules within the cell. Additionally, actin interacts with other proteins to facilitate processes like muscle contraction and cell signaling. Overall, actin is essential for the proper functioning of cells in the human body.