Csigaház

Csigaház is the Hungarian term for a snail's shell, the hard protective housing produced by the mantle of gastropod mollusks. The shell shelters the soft body, aids in moisture retention, and provides defense against predators. It is primarily made of calcium carbonate and commonly consists of three layers: an outer periostracum, a prismatic layer, and an inner nacreous layer in many species.

Growth occurs at the aperture as the snail enlarges. Shells vary in shape, color, and pattern; most are coiled and display right-handed (dextral) spirals, though left-handed (sinistral) shells occur in some species. The shell’s form reflects genetics and environmental factors such as habitat and diet.

Snails inhabit marine, freshwater, and terrestrial environments. The shell protects against dehydration for land snails and affords defense in all habitats. Diversity includes many families with a wide range of sizes, shapes, and ornamentation, from slender conical to globose forms.

In science and culture, snail shells are used in taxonomy, paleoecology, crafts, and jewelry. They appear in the fossil record, contributing to studies of molluscan evolution. Some species are threatened by habitat loss, pollution, and collection, making conservation of snail habitats important for maintaining biodiversity.