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A clam's shell consists of two (usually equal) valves, which are connected by a hinge joint and a ligament that can be internal or external. [6] The ligament provides tension to bring the valves apart, whilst one or two adductor muscles can contract to close the valves. Clams also have kidneys, a heart, a mouth, a stomach, and a nervous system.
Empty clamshell package Clamshell pack of screws Paperboard clamshell for fast food PETE plastic egg carton for 24 eggs. A clamshell is a one-piece container consisting of two halves joined by a hinge area which allows the structure to come together to close.
Clamshell may denote anything resembling the bivalve shell of a clam: Scoop stretcher, another name for this patient transport device; Clamshell design, a form factor used for electronic devices, also known as a "flip" or "flip phone". Clamshell (container), a design used for storage and food packaging, usually made of plastic or paperboard.
An old quahog shell that has been bored (producing Entobia) and encrusted after the death of the clam. Hard clams are quite common throughout New England, north into Canada, and all down the Eastern seaboard of the United States to Florida; but they are particularly abundant between Cape Cod and New Jersey, where seeding and harvesting them is an important commercial form of aquaculture.
The shell of this species is a well-known object to beach-goers in the northeastern United States. People on the beach often pick up a large empty shell of this species, either to dig in the sand with, or take home to use as a decorative dish or ashtray. [2] The species is exported commercially as a food item.
Its streamlined shell and strong foot allow Jackknife clams to burrow quickly in wet sand. Jackknife clams are also able to swim by propelling jets of water out of their shells. The Jackknife clam gets its name from its shell's extremely sharp rim and the overall shape bearing a strong resemblance to an old fashioned straight razor. Beachgoers ...
The shell's length was 115 centimetres (3 ft 9 in), and it weighed 333 kilograms (734 lb) dead and estimated 340 kilograms (750 lb) alive. [ 6 ] : 32 Giant clam in Bunaken Island, Sulawesi , Indonesia
In some species such as Barbatia, this outer horny covering is tufted at the end of the shell into something that resembles a beard, hence the name Barbatia or bearded one. The thick outer skin or periostracum of an ark clam can act as camouflage , such that the shells can sometimes look like stones when lying on the bottom.