Assertion: thymus's tissue | /r/HasProperty | replaced by fatty tissue
Facets:
value: gradually
type: MANNER
Source sentences:
text: By the early teens, the thymus begins to decrease in size and activity and the tissue of the thymus is gradually replaced by fatty tissue.
text: By the early teens, the thymus begins to decrease in size and activity and the tissue of the thymus is gradually replaced by fatty tissue.
text: It doubles in size by puberty, after which it gradually shrinks, its functional tissue being replaced by fatty tissue.