Latest news from Duxbury, MA collected exclusively by city-data.com from local newspapers, TV, and radio stations. Ancestries: English (31.7%), Irish (13.8%), German (8.2%), Italian (5.0%), British (4.9%), Slovak (2.9%). Current Local Time: EST time zone. Incorporated in 1637. Elevation: 36 feet. Land area: 2.17 square miles.
Hinge joints allow movement in one direction, as seen in the knees  and elbows and fingers.    FUNCTION: The purpose of joints is to provide movement for the  body.
...4A) are hinged together. They can be closed to protect the animal within or allowed to open. A block of rubbery protein, the inner hinge ligament, lies just inside the hinge. When the adductor muscle contracts, it closes the shell, but, in so doing, it compresses the inner hinge ligament. When it relaxes, the ligament recoils elastically, reopening the shell. This is an unusual...