Mollusc anatomy

thumb|upright=1.2|The iridescent nacre inside a nautilus shell thumb|upright=1.2|Nacreous shell worked into a decorative object

part of the anatomy of molluscs

The nephridium (: nephridia) is an invertebrate organ, found in pairs and performing a function similar to the vertebrate kidneys (which originated from the chordate nephridia). Nephridia remove metabolic wastes from an animal's body and come in two basic categories: metanephridia and protonephridia. In some cases, nephridia may fuse or become functionally integrated with coelomoducts—mesodermal structures that open from the coelom to the exterior—to form a more complex structure known as a nephromixium. All animals possessing nephridia or kidneys belong to the clade Nephrozoa.

exoskeleton of an animal in the phylum Mollusca

thumb|right|alt=|Drawing of the statocyst system thumb|Statocysts (ss) and statolith (sl) inside the head of sea snail Gigantopelta chessoia

thumb|right|The exoskeleton of a [[spiny lobster is made of a series of sclerites, connected by flexible joints.]] A sclerite (Greek , ', meaning "hard") is a hardened body part. In various branches of biology the term is applied to various structures, but not as a rule to vertebrate anatomical features such as bones and teeth. Instead it refers most commonly to the hardened parts of arthropod exoskeletons and the internal spicules of invertebrates such as certain sponges and soft corals. In paleontology, a scleritome''' is the complete set of sclerites of an organism, often all that is known

right|thumb|200px|A drawing of the glochidium of the swan mussel ([[Anodonta cygnea). The larva is 0.35 mm long]] right|thumb|200px|Glochidia of the mussel Lampsilis higginsii

thumb|upright|Peristome of Bryum capillare moss

The hepatopancreas, digestive gland or midgut gland is an organ of the digestive tract of arthropods and molluscs. It provides the functions which in mammals are provided separately by the liver and pancreas, including the production of digestive enzymes, and absorption of digested food.

The notum (plural nota) is the dorsal portion of an insect's thoracic segment, or the dorsal surface of the body of nudibranch gastropods. The word "notum" is always applied to dorsal structures; in other words structures that are part of the back of an animal, as opposed to being part of the animal's ventral surface, or underside.

Fabric produced using silk-like clam secretions

fairly rigid joint between two or more hard elements of an organism