BO VEISLAND, MI&I / SCIENCE PHOTO LIBRARY BO VEISLAND, MI&I / SCIENCE PHOTO LIBRARY
Animal cell. Cutaway illustration of a typical animal cell showing various internal structures. The nucleus (large round, lower centre) contains genetic material and the nucleolus (brown). This is surrounded by a system of membranes (purple) known as the endoplasmic reticulum (ER). Ribosomes (pink dots), involved in protein synthesis, are associated with the ER (rough ER) and occur free in the cell cytoplasm (pale blue). Mitochondria (pink, oval) produce energy. The membranes of the Golgi apparatus (brown, upper centre) produce secretory granules (round, brown). Cell vacuoles (yellow and green) and centrioles (orange, at centre left) are also illustrated.
Model release not required. Property release not required.