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fibril noun[ C ] anatomy specializeduk /ˈfaɪ.brɪl/ us /ˈfaɪ.brəl//ˈfɪb.rəl/ a thread-like structure of living tissue, such as those found in muscle: Collagen fibrils in smooth muscle probably play an important role in intercellular transmission of active force. This organ dysfunction results from the deposition of amyloid fibrils. Changes in glycosaminoglycans are likely to influence the mechanical strength of the collagen fibrils. Collagen I is arranged in the form of bundles, with thick, closely-packed fibrils. This had a negative effect on the formation of elastin fibrils. SMART Vocabulary: related words and phrases Substances & structures in the body abductor accessorius ACL actin adductor funiculus fusiform glomerular glomerulus GnRH navicular neuroendocrine neurohormonal neurohormone nociceptive tendinous tendinum tendo tensor Th
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