Assertion: cardiac muscle's t tubule | /r/HasProperty | between 20 and 450 nanometers
Facets:
value: in diameter
type: OTHER
value: in cardiac muscle cells
type: LOCATION
Source sentences:
text: In cardiac muscle cells, T-tubules are between 20 and 450 nanometers in diameter and are usually located in regions called Z-discs where the actin filaments anchor within the cell.