Mollusca Anatomy

Wikimedia commons has media related to mollusca anatomy. Bivalves are easily distinguished from other molluscs by the presence of two shells or valves.

Some Comparative Anatomy Between Mollusca Biomedical

Oysters clams scallops and yes snails squid and octopods.

Mollusca anatomy. External and internal anatomy of a freshwater mussel. The three most universal features defining modern molluscs are a mantle with a significant cavity used for breathing and excretion the presence of a radula except for bivalves and the structure of the nervous system. This category has the following 5 subcategories out of 5 total.

Other than these common elements molluscs express great morphological diversity. They however also have many features in common. Jump to navigation jump to search.

Locomotion the foot is the organ of locomotion in land gastropods. It has three layers and protects the main organs of the mollusk. Phylum mollusca class bivalvia.

The foot although the basic form of the foot is a flat broadly tapered muscular organ which is highly. In swimming and sessile forms however the foot is greatly reduced or greatly modified. In limpets the foot is modified into a sucker which helps in anchoring the animal to hard surfaces.

2body has more than two cell layers tissues and organs. Molluscs have a huge range of shapes and sizes even with a single group like the gastropods. This is what is examined in this section.

Most are familiar to you as food sources. Anatomy of molluscs. Mollusca anatomy function with some nematodes mantle cavity respitory systems open circulatory system developed eyes bilatteral head and food body wall forms mantle and mantle cavity.

Shell many molluscs have shells. 5body monomeric and highly variable in form may possess a dorsal or lateral shells of protein and calcareous spicules. The shells of molluscs are formed of calcium carbonate 95 and organic components 1.

4body possesses a through gut with mouth and anus. B bivalve anatomy 16 p c cephalopod zootomy 41 p g gastropod anatomy. The feet of the molluscs carry out different functions in different classes.

The phylum mollusca consists of over 100000 marine freshwater and terrestrial species. Coelem protect important organs. Calcareous casing produced by the mantle.

Characteristics of mollusca 1bilaterally symmetrical. Some also serve as intermediate hosts for parasitic trematodes and others eg snails can be major agricultural pests. The foot in the gastropods.

The edge of the mantle secretes a shell of calcium carbonate chitin and conchiolin.

Phylum Mollusca