Watch red blood cells travel through arteries and capillaries to deliver oxygen
Learn about red blood cells (erythrocytes) by watching them move through arteries and capillaries. As the cells move through the capillaries, they deliver oxygen to the surrounding tissues.
Encyclopædia Britannica, Inc.
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Encyclopædia Britannica, Inc.This fruit was a favorite of George Washington—but has been largely forgotten.
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Encyclopædia Britannica, Inc.Learn about Komodo dragons (Varanus komodoensis), found on Komodo Island and a few other islands of Indonesia's Lesser Sunda Islands.
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Contunico © ZDF Studios GmbH, MainzOverview of thyme.
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Encyclopædia Britannica, Inc.Learn about the human immune response phagocytosis by watching time-lapse photography of a leukocyte, or white blood cell (globular structure), consuming bacteria.
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Encyclopædia Britannica, Inc.In a circuit through the cardiovascular system, red blood cells transport oxygen from the lungs to the body tissues and transport carbon dioxide from the body tissues to the lungs.
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Encyclopædia Britannica, Inc.Bright swarms of Daphnia serve as the food source of many larger animals. The internal processes of Daphnia are easily studied through its transparent carapace. A single eye, sensitive to light, causes Daphnia to react in a sunlit river.
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© Open University (A Britannica Publishing Partner)Learn about sickle cell anemia.
