Assertion: muscle fiber's muscle | /r/AtLocation | various scales
Facets:
value: to the blood vessels
type: LOCATION
value: to digestive tract
type: LOCATION
Source sentences:
text: In contrast, smooth muscle occurs at various scales in almost every organ, from the skin (in which it controls erection of body hair) to the blood vessels and digestive tract (in which it controls the caliber of a lumen and peristalsis, respectively).