Animal cell structure. Illustration of the internal structure of an animal cell. Inside the cell, the cellular structures (organelles) include the Golgi apparatus (orange folds), the rough endoplasmic reticulum (green) with ribosomes (purple spheres), mitochondria (orange and yellow), the cell nucleus (orange, centre), various cytoskeleton elements (cylinders and strands), and internal transport vesicles (orange spheres). The cell nucleus has been dissected to reveal its interior (nucleolus, red) where the genetic material DNA (deoxyribonucleic acid, blue) is stored. The lipid bilayer structure of the cell's outer membrane is also shown. |