Cytoskeleton 口 The cytoskeleton UIs a network of fibers extending throughout the cytoplasm u Fibers appear to support the endoplasmic reticulum. mitochondria and "free" ribosomes Microtubuleahmad ata 3 Cytoskeleton : ❑The cytoskeleton ❑Is a network of fibers extending throughout the cytoplasm ❑Fibers appear to support the endoplasmic reticulum, mitochondria, and “free” ribosomes Microtubule 0.25 µm Microfilaments