| | | The Pulmonates - Molluscs with Lungs The snails and slugs form a group known more formally as the pulmonates. The pulmonantes are unique from other molluscs in that most species (with one possible exception) have lost their gills and breath using a simple lung formed by their mantle cavity. Most pulmonates have coiled shells but some groups (namely, the slugs) have lost their shells. | Cephalopods - The Jet-Propelled Molluscs Of all the many ways animals get aroundâ"running, climbing, swimming, flying, lumbering, jumping, slitheringâ"the oddest by far is jet propulsion. Only a few groups of animals use this method of movement and the cephalopods are among the most adept. | Facts About Primates In this article, you'll learn interesting facts about primates and find out about their unique characteristics, their life cycle and their evolutionary history. | Facts About Invertebrates In this article, you'll learn interesting facts about invertebrates and find out about their unique characteristics, their life cycle and their evolutionary history. | | | | Animals / Wildlife Ads | | | | Featured Articles | | | | | More from About.com | | | | | | Food and Mood Indulging a sweet tooth can cause weight gain, guilt and even worsen depression. Here are a few expert tips to help you resist. More>
| | | | Carb Cravings Ever wondered why you crave carbs (or chocolate and sugar) when you're depressed? Some scientists say it may be chemical. More>
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