Oyster: edible bivalve mollusk.
Ventricle: small chamber in the heart of an oyster.
Intestine: final part of the oyster's digestive tract.
Stomach: part the the oyster's digetive tract before the intestine.
Digestive gland: organ of an oyster that secretes digestive enzymes.
Hinge: point where the two parts of an oyster shell pin.
Labial palp: mobile appendage of an oyster.
Shell: hard protective covering of an oyster.
Mantle: fold of the oyster's skin covering its internal organs.
Auricle: large chamber in the heart of an oyster.
Gills: respiratory organs of the oyster.
Accutor muscle: muscular tissue that produces forward motion.