Explore: Shell (animal Material)

A seashell or sea shell, also known simply as a shell, is a hard, protective outer layer usually created by an animal or organism that lives in the sea

the rib cage. The turtle's shell is important to study, not just because of the apparent protection it provides for the animal, but also as an identification

dump for domestic waste. It may consist of animal bones, human excrement, botanical material, mollusc shells, potsherds, lithics (especially debitage)

is the only known extant animal that incorporates iron sulfide into its skeleton (into both its sclerites and into its shell as an exoskeleton). Its heart

own food, a feature they share with fungi. Animals ingest organic material and digest it internally. Animals have structural characteristics that set them

An animal product is any material derived from the body of a non-human animal or their excretions. Examples are meat, fat, blood, milk, eggs, honey, and

hinge line. In many bivalve shells, the two valves are symmetrical along the hinge line — when truly symmetrical, such an animal is said to be equivalved;

mollusc (or mollusk) shell is typically a calcareous exoskeleton which encloses, supports and protects the soft parts of an animal in the phylum Mollusca

shelly material within the outer lip of the aperture of some gastropod shells. The adjectival form of the word is "lirate". Portal: Animals v t e v t e

growth of a shell". Materials that break in this way include quartz, chert, flint, quartzite, jasper, and other fine-grained or amorphous materials with a