What types of cells are there? Bone cells are irregular in shape. Blood cells are flat discs. Muscle cells are very long. Brain cells are large and have many spider-like arms. Liver cells are quite large and hexagonal in shape. Intestinal cells are shaped like a brush. Cells are very small and they have different shapes and sizes. Animal cells Animals have many different types of cells. Each type of cell carries out a specialised function in the body. Animal cells can be disc shaped, star shaped, round, rectangular or irregularly shaped. The smallest cells are the cells of bacteria, which measure around 0.001 mm. This algae called Acetabularia is formed by a single cell that measures about 1 cm. 12 · t w e l v e
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