Fibril

Fibril denotes the diminutive of fiber (lat. fiber = fiber ). Fibrils are so small, thin fibers. They are often only visible with optical aids, elongated structures and essential part of plant cell walls, the muscles and the ground substance of connective tissue. There are fibrils:

In cell biology,

• Microfibrils of the cell wall of plants
• Myofibrils in muscle cells
• Neurofibrillary tangles in neurons
• Tonofibrils in epithelial cells
• Collagen fibrils that are embedded in the cement substance of hyaline cartilage
• Chromatinfibrillen, condensed chromatin

In dentistry

• Keratin fibrils in the cortex

In astrophysics

• Dark fibrous components of the penumbra

• Disambiguation