Tergum parts are separated by internal
skeletal folding, ridges, and sutures.
Tergum composed of notum, and
postnotum.
The notum can be further subdivided
into the prescutum, scutum, and
scutellum (PSC, SC, SCT)
During flight each part of tergum reacts
to the contraction of muscles by
moving in a specific direction or
distorting in a particular way.
These complex elastic deformations
cause wing movement