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The structure of the vasa vasorum varies with the size, function and location of the vessels. Cells need to be within a few cell-widths of a capillary to stay alive. In the largest vessels, the vasa vasorum penetrates the outer (tunica adventitia) layer and middle (tunica media) layer almost to the inner (tunica intima) layer.
Blood vessels function to transport blood to an animal's body tissues. In general, arteries and arterioles transport oxygenated blood from the lungs to the body and its organs, and veins and venules transport deoxygenated blood from the body to the lungs. Blood vessels also circulate blood throughout the circulatory system.
The human hepatic portal system delivers about three-fourths of the blood going to the liver.The final common pathway for transport of venous blood from spleen, pancreas, gallbladder and the abdominal portion of the gastrointestinal tract [2] (with the exception of the inferior part of the anal canal and sigmoid colon) is through the hepatic portal vein.
In 2nd century AD Rome, the Greek physician Galen knew that blood vessels carried blood and identified venous (dark red) and arterial (brighter and thinner) blood, each with distinct and separate functions. Growth and energy were derived from venous blood created in the liver from chyle, while arterial blood gave vitality by containing pneuma ...
Tlaltecuhtli is typically depicted as a squatting toad-like creature with massive claws, a gaping mouth, and crocodile skin, which represented the surface of the earth. In carvings, her mouth is often shown with a river of blood flowing from it or a flint knife between her teeth, a reference to the human blood she thirsted for.
Aztec is a 1980 historical fiction novel by American author Gary Jennings. It is the first of two novels Jennings wrote in the Aztec series, followed by Aztec Autumn , 1997. The remaining four novels ( Aztec Blood , 2002; Aztec Rage , 2006; Aztec Fire , 2008; Aztec Revenge , 2012) were written by other authors after Jennings died in 1999.
For example, I used the word "Aztec" in a paragraph above for ease of recognition, but as Enrigue’s novel makes clear, there was no such thing as an “Aztec Empire” — a term that was coined ...
The supraorbital vein is a vein of the forehead.It communicates with the frontal branch of the superficial temporal vein.It passes through the supraorbital notch, and merges with the angular vein to form the superior ophthalmic vein.