Assertion: mastodon's skull | /r/UsedFor | larger muscle attachments
Facets:
value: for both chewing
type: PURPOSE
value: for muscles to the back
type: PURPOSE
Source sentences:
text: Accompanying these changes were a deeper lower jaw to accommodate the higher-crowned teeth, larger tusks, and a taller skull to allow for larger muscle attachments for both chewing and for muscles to the back that were needed to counterbalance the weight of the tusks.