Z-disk

[ZEE-disk]
nounpl: Z-disks
disco Z
1. A thin, dark-staining disc or band in striated muscle that serves as the boundary between adjacent sarcomeres, to which thin filaments are anchored
The Z-disk is where the thin filaments of the sarcomere are anchored at both ends.
O disco Z é onde os filamentos finos do sarcômero estão ancorados em ambas as extremidades.
2. Also known as Z-line or Z-band; a critical structural component in muscle contraction
Mutations in Z-disk proteins can lead to myopathies.
Mutações em proteínas do disco Z podem levar a miopatias.
This is a specialized anatomical and medical term used primarily in academic and clinical settings. It is essential vocabulary for students of medicine, biology, physiology, and related fields. The term reflects the microscopic structure of muscle tissue and is named after the German word 'Zwischenscheibe' (disc between fibrils).
Synonyms / Sinônimos
Z-lineZ-bandZ-membranezona pellucida

Regional Variations

General Brazilian
disco Z
Standard anatomical term used in medical and biological education
Portugal
disco Z
Same term used in Portuguese medical literature
General English-speaking countries
Z-disk/Z-disc
Both spellings (disk/disc) are acceptable in English scientific literature

Related Words

sarcomerethin filamentsmuscle fibermyofibrilA-bandI-bandH-zone
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