of the skeleton
The fore-limb used in swimming
is probably the most striking adaptation to be found in the skeleton of
a sea turtle. The radius and ulna are fused by connective tissue to make
them more rigid. The fingers or digits have become elongated and stiffened
by layers of fibrous tissue covered with scaly skin. The coracoid of the
pectoral girdle is expanded for the attachment of the powerful swimming
muscles (Wyneken J, 1997).