Moluscos

MOLLUSCS
PROJECT

MOLLUSCS


Content | Page |
PROJECT DEVELOPMENT | 3 |
INTRODUCTION | 3 |
GENERAL FEATURES | 4 |
EXTERNAL ANATOMY | 4 |
REPRODUCTION | 5 |SYSTEMATIC | 5 |
MOST COMMON GROUPS OF MOLLUSCS | 6 |
* CLASS GASTROPODS | 7 |
* CLASS CEPHALOPODS | 8 |
* CLASS POLYPLACOPHORAN | 9 |
* CLASS SCAPHOPODS | 10 |MOLLUSCS

PROJECT DEVELOPMENT

This project defines what is a mollusk, as is formed, the classes of Molluscs (species), anatomy and reproduction.

INTRODUCTION

Molluscs (Mollusca, fromLatin molluscum "soft") are a major animal phyla. They are soft-bodied invertebrates, naked or protected by a shell. They have so familiar forms such as clams, oysters, squid, octopus, snails and avariety of snails, both marine and terrestrial.
Mollusks live in all environments, from high altitudes over 3,000 m above sea level to ocean depths of over 5,000 m deep in polar or tropical waters.Man's interest in molluscs is enormous. Molluscs are an important source of food for humans
The variety of shapes, sizes, types and life cycles of life is extraordinary enough to compare a mussel, asnail and a squid. But the organization of all molluscs follows a basic plan.

GENERAL FEATURES

The term animal SHELLFISH means of "soft body". They are animals with bilateral symmetry.

Mosthave an exoskeleton of calcium carbonate called SHELL
They are currently the largest group of animals after the arthropods, approximately 100,000 species.

EXTERNAL ANATOMY

GENERAL ORGANIZATIONThey have the body divided into three parts:

Head, foot and visceral mass

     1. In the HEAD are the sense organs that serve to explore the medium.

    2. The PIE can be used to crawl(snails), digging (clams) or to trap animals (octopus)

    3. In the visceral mass is where most of the organs. In turn, the visceral mass is covered by the mantle is responsible for making the...