Assertion: membrane's layer | /r/CapableOf | expand to hold the volume of urine
Facets:
Source sentences:
text: As the urinary bladder fills, the epithelial layer unfolds and expands to hold the volume of urine introduced into it.
text: As the urinary bladder fills, the epithelial layer unfolds and expands to hold the volume of urine introduced into it; the lining becomes thinner.