Mollusk Anatomy

Many mollusks have a hard external shell but others do not. Locomotion the foot is the organ of locomotion in land gastropods.

1835 Mollusk Shell Anatomy Physiology Original Antique Sea Life Engraving

Many mollusks have a hard external shell but others do not.

Mollusk anatomy. Snails clams and squids are some of the popular examples of this phylum. Most molluscs have a head with eyes and all have a pair of tentacles with sensors also on the head that detect chemicals vibrations and touch. Soft bodied invertebrate animal protected by a hard shell.

In swimming and sessile forms however the foot is greatly reduced or greatly modified. Radula plural radulae or radulas horny ribbonlike structure found in the mouths of all mollusks except the bivalves. Hard protective covering of a mollusk.

Describe the morphology and anatomy of mollusks a large muscular foot that may be modified into tentacles but it functions in locomotion. The radula part of the odontophore may be protruded and it is used in drilling holes in prey or in rasping food particles from a surface. Because of the great range of anatomical diversity among molluscs many textbooks start the subject of molluscan anatomy by describing what is called an archi mollusc hypothetical generalized mollusc or hypothetical ancestral mollusc ham to illustrate the most common features found within the phylum.

A budge of the esophagus of a mollusk. The morphology and anatomy of modern bivalves have been much altered from those of ancestral mollusks which had a distinct anterior end with a mouth and a posterior end with an anus figure 1. The anatomystructures of molluscs are complex in nature.

There are over 50000 different types of mollusks alive today. Anatomical characteristics of molluscs. Digestive cavity of a mollusk.

The facts related to the anatomy physiology etc of these creatures are enlisted in the paragraphs below. Different traits of phylum mollusca. Genital gland producing spermatozoa sperm or ova eggs depending on the sex of the mollusk.

Mollusks are a phylum of soft bodied invertebrate animals. The foot although the basic form of the foot is a flat broadly tapered muscular organ which is highly. Gills respiratory organs located between the foot and the mantle formed of two layers of ciliated filaments which filter water and retain food particles.

Only some species of molluscs have a brain. Organ of a molluks which performs the functions of a liver and pancreas. The eyes of the giant squid are the largest in the animal kingdom almost the size of dinner plates.

They have a mantle a structure of tissue that covers and encloses the dorsal portion of the animal and secretes the shell when it is present. Internal anatomy of a mollusk. Mucus secreting organ of a mollusk.

Figure 15 24 Which Of The Following Statements About Bartleby