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Vascular bundles in this cross section of a dahlia flower stalk help the plant distribute water and nutrients to its tissues.

Vascular bundles in this cross section of a dahlia flower stalk help the plant distribute water and nutrients to its tissues.

Axones nerviosos - A cross section of a bundle of nerve fibers.  Axons (orange) are wrapped in myelin (purple); an extension of the membrane of glial cells.  Myelin has high lipid content, and acts to insulate the axons, causing them to transmit nerve impulses much faster.

Axones nerviosos - A cross section of a bundle of nerve fibers. Axons (orange) are wrapped in myelin (purple); an extension of the membrane of glial cells. Myelin has high lipid content, and acts to insulate the axons, causing them to transmit nerve impulses much faster.

Microscopy prints would make a great, colorful, abstract series for a wall somewhere. Tree of heaven section. Microscopy. Cells. Red. #groveevanston

Microscopy prints would make a great, colorful, abstract series for a wall somewhere. Tree of heaven section. Microscopy. Cells. Red. #groveevanston

Goblet and secretory cells. Coloured transmission electron micrograph (TEM) of a section through a goblet cell (pink & blue) and secretory cells of the duodenum, part of the small intestine. The goblet cell secretes mucus which neutralises stomach acid. The mucigen granules (circular objects, at upper centre) combine with water to form the mucus. On either side of the goblet cell are the secretory cells whose secretions help in the digestive process. The microvilli (green hair- like…

Goblet and secretory cells. Coloured transmission electron micrograph (TEM) of a section through a goblet cell (pink & blue) and secretory cells of the duodenum, part of the small intestine. The goblet cell secretes mucus which neutralises stomach acid. The mucigen granules (circular objects, at upper centre) combine with water to form the mucus. On either side of the goblet cell are the secretory cells whose secretions help in the digestive process. The microvilli (green hair- like…

mitochondria packed between myofibrils in cardiac muscle the crystalline appearance of the numerous mitochondria is a result of densely packed cristae or infoldings of the inner membrane this design dramatically increases the surface area of the inner mitochondrial membrane in which ATP-producing machinery is embedded colored TEM credit: Science Photo Library

mitochondria packed between myofibrils in cardiac muscle the crystalline appearance of the numerous mitochondria is a result of densely packed cristae or infoldings of the inner membrane this design dramatically increases the surface area of the inner mitochondrial membrane in which ATP-producing machinery is embedded colored TEM credit: Science Photo Library

Red blood cells ,erythrocytes, in a vein showing their biconcave shape.  TEM X18,000

Red blood cells ,erythrocytes, in a vein showing their biconcave shape. TEM X18,000

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