| | Conditions Treatments | Bones, Joints Muscles Does a gastropod have two shells held together by hinges and strong muscles? No, a gastropod has a single, coiled shell. Bivalves, such as clams, have two shells held together by hinges and strong muscles. Bones, Joints Muscles - Related Articles Cultural & Traditional Treatments for Osteoporosis What homeopathic remedy treats toncilitis? How to Move a Trash Can Uphill Physical Therapy for Posterial Tibial Tendonitis Vitamin Supplements for Muscle Health How to Live Instead of Exist Graviola Raw Herbs