A cavity within the protoplasm of a cell containing a solution of sugars, pigments, etc., together with colloidal materials.
A space in a fold of a cell membrane.
Small space in a cell, especially one containing material taken in by the cell.
A space within the cytoplasm of a cell, formed by infolding of the cell membrane, that contains material taken in by the cell. White blood cells form vacuoles when they surround and digest bacteria and other foreign material.
A space inside the cytoplasm of cells. It is formed by a folding-in of the cellular membrane when the cell ingests material from the outside for example, when white blood cells attack bacteria.
A membrane-bound cell organelle, which may contain water, secretions, enzymes, or the remains of ingested material.
Any transparent area that appears within the protoplasm of a living cell.