The cytoskeleton of eukaryotic cells is made of filamentous proteins, and it provides mechanical support to the cell and its cytoplasmic constituents. All cytoskeletons consist of three major ...

(D) Then, retraction fibers pull the rear of the cell forward. Dynamic networks of protein filaments give shape to cells and power cell movement. Learn how microtubules, actin filaments ...

Muscle cells contain filaments of protein that slide over each other to cause muscle contraction. The arrangement of these filaments causes the banded appearance of heart muscle and skeletal muscle.