Blood vessel vessels function to transport blood. 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 Oxygen (bound to hemoglobin in red blood cells) is the most critical nutrient carried by the blood. In all arteries apart from the pulmonary artery, hemoglobin is highly saturated (95–100%) with oxygen. In all veins apart from the pulmonary vein, the saturation of hemoglobin is about 75%. (The values are reversed in the pulmonary circulation.) In
The Sacrament of the Body and Blood of Christ—Against the Fanatics both sides became more firmly entrenched into their positions. The Sacrament of the Body and Blood of Christ—Against the Fanatics The Sacrament of the Body and Blood of Christ—Against the Fanatics is a book by Martin Luther, published in late September or early October 1526 to aid Germans confused by the spread of new ideas from the Sacramentarians. At issue was whether Christ's true body and blood were present in the Lord's Supper, a doctrine that came to be known as the sacramental union. The of Christ's true body and blood in the Lord's Supper was a controversial issue at