CLAUS LUNAU / SCIENCE PHOTO LIBRARY CLAUS LUNAU / SCIENCE PHOTO LIBRARY
Animal cell structure. Illustration of the internal structure of an animal cell. Inside the cell, the cellular structures (organelles) include the Golgi apparatus, the rough endoplasmic reticulum (pink), mitochondria (green and yellow), the cell nucleus (red), various cytoskeleton elements (cylinders and strands), and internal transport vesicles (green spheres). The cell nucleus has been dissected to reveal its interior where the genetic material DNA (deoxyribonucleic acid) is stored, shown here as chromosomes (pink and blue). Also shown are chemicals entering the cell (red spheres) through membrane pores, and viruses (yellow) attacking the cell.
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