Parenchyma cells are

[A] Relatively unspecified and thin walled
Parenchyma cells make up the bulk of the plant body. Its cells are alive and have the power to divide. The cells are round or isodiametric, that is, evenly spaced on all sides. Cells are oval, round, polygonal or elongated with a thin cell wall. It encloses a dense cytoplasm, containing small nuclei and enclosing the large central vacuole.