Precursor of the final, mature form of a cell.
A wave of air pressure from an explosion which can cause concussion.
An immature form of a cell before distinctive characteristics develop.
A cell that produces something (e.g., osteoblast, fibroblast).
A sudden, violent movement of air such as accompanies the explosion of a shell or bomb; a violent sound, as the blast of a horn. It often causes damage to blast sensitive organs such as the tympanic membrane, lung, or colon. It may also forcibly move people and objects, resulting in unpredictable injuries to unprotected body parts.