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The "singeing ceremony" was given to both Aztec boys and girls. It is uncertain of the age in which this ritual occurred. It was indicative of becoming one with the stars, as the burns on the wrists were aligned with certain constellations. A stick that had been placed in a fire would be pressed onto the skin of the child and the scar was thus ...
duct, blood vessel: Latin vās, vessel, dish, vase vasoconstriction: vasculo-blood vessel: Latin vāsculum: cardiovascular: ven-of or pertaining to the veins, venous blood, and the vascular system: Latin vēna, blood-vessel, vein venule, venospasm: ventr(o)-of or pertaining to the belly, the stomach cavities Latin venter, belly, stomach, womb ...
Aztec medicine concerns the body of knowledge, belief and ritual surrounding human health and sickness, as observed among the Nahuatl-speaking people in the Aztec realm of central Mexico. The Aztecs knew of and used an extensive inventory consisting of hundreds of different medicinal herbs and plants.
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.
It notes that the heart is the center of blood supply, and attached to it are vessels for every member of the body. The Egyptians seem to have known little about the function of the kidneys and the brain, and made the heart the meeting point of a number of vessels which carried all the fluids of the body— blood , tears , urine , and semen .
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 ...
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 ...
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. In smaller vessels it penetrates only the outer layer. In the smallest vessels, the vessels' own circulation nourishes the walls directly and they have no vasa vasorum at all.