Mollusca Anatomy

Bivalves are easily distinguished from other molluscs by the presence of two shells or valves. Shell many molluscs have shells.

Scientific Illustration Class Gastropoda Of Phylum Mollusca

Calcareous casing produced by the mantle.

Mollusca anatomy. Wikimedia commons has media related to mollusca anatomy. They however also have many features in common. 4body possesses a through gut with mouth and anus.

B bivalve anatomy 16 p c cephalopod zootomy 41 p g gastropod anatomy. Jump to navigation jump to search. Some also serve as intermediate hosts for parasitic trematodes and others eg snails can be major agricultural pests.

The shells of molluscs are formed of calcium carbonate 95 and organic components 1. 2body has more than two cell layers tissues and organs. Locomotion the foot is the organ of locomotion in land gastropods.

Phylum mollusca class bivalvia. In limpets the foot is modified into a sucker which helps in anchoring the animal to hard surfaces. Other than these common elements molluscs express great morphological diversity.

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. Most are familiar to you as food sources. Anatomy of molluscs.

Molluscs have a huge range of shapes and sizes even with a single group like the gastropods. In swimming and sessile forms however the foot is greatly reduced or greatly modified. It has three layers and protects the main organs of the mollusk.

The feet of the molluscs carry out different functions in different classes. Characteristics of mollusca 1bilaterally symmetrical. Oysters clams scallops and yes snails squid and octopods.

This is what is examined in this section. 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. The foot although the basic form of the foot is a flat broadly tapered muscular organ which is highly.

Coelem protect important organs. The phylum mollusca consists of over 100000 marine freshwater and terrestrial species. This category has the following 5 subcategories out of 5 total.

The foot in the gastropods. External and internal anatomy of a freshwater mussel. 5body monomeric and highly variable in form may possess a dorsal or lateral shells of protein and calcareous spicules.

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

Zoology Lab Final Mollusca Flashcards Quizlet