The shell of a bivalve has two valves and these are joined by the ligament at the dorsal edge of the shell. The ligament is made of a strong, flexible and elastic, fibrous, proteinaceous material which is usually pale brown, dark brown or black in color.

A constructional morphology approach was employed in order to understand the mechanical operation of the shell–ligament system in the Pterotrigoniinae. Ligament structure and evolution have been extensively treated in the literature and their detailed discussion is beyond the scope of this contribution.

A bivalve shell is the enveloping exoskeleton or shell of a bivalve mollusc, composed of two hinged halves or valves. The two half-shells, called the "right valve" and "left valve", are joined by a ligament and usually articulate with one another using structures known as "teeth" which are situated along the hinge line .

Bivalve molluscs are completely enclosed by a shell made of two valves hinged at the top. A hinge ligament made of elastic protein joins the two halves of the shell together, and large adductor muscles between the two valves hold them closed.

The bivalve shell typically consists of two calcareous, convex valves that are hinged dorsally and free ventrally. The hinge margin is typically united by a non-calcified ligament and a set of articulating hinge teeth. The valves lie on the left and right sides of the animal.

A band of horny and elastic material, the ligament (fig. 16) joins the valves at the hinge on which they turn in opening or closing the shell. In many bivalves the hinge carries a series of interlocking teeth, but these structures are absent in the family Ostreidae.

2019年12月1日 · The hinge ligament shell complex is a unique functioning structural tissue whose elastic properties enable the shell to open without expending energy. Methionine-rich proteins are not known elsewhere raising fundamental questions about secondary and tertiary structures contributing to its elastic properties.

The ligament is presented as a mid-dorsal, largely uncalcified, region of the shell initially arising by lateral compression preceding calcification. Muscular attachment of the mantle near to the shell margin would then produce anterior and posterior adductors acting in opposition to the ligament uniting now calcareous valves.

2015年12月1日 · ABSTRACT The bivalve ligament provides the thrust for shell opening, acting as the resistance in a lever system against which adductor muscle effort is applied. Usually, its outer lamellar layer is subjected to tensile stress, while the inner fibrous layer is compressed, with the pivotal axis located between them.

2017年1月16日 · The bivalve ligament provides the thrust for shell opening, acting as the resistance in a lever system against which adductor muscle effort is applied. Usually, its outer lamellar layer is subjected to tensile stress, while the inner fibrous layer is compressed, with the pivotal axis located between them.