In certain cities, too, traditional farms and other forms of urban farming - such as crops grown on rooftops or vacant lots - may only be 60 to 100 miles away, close enough to compete with vertical farms. Vertical-farming projects have sprouted up in several North American cities as well as in the Netherlands, Scandinavia, Germany, Korea, Japan, Abu Dhabi and Singapore among others.
Deoxygenated blood enters the right atrium through three major veins: the superior and inferior vena cava and the coronary sinus. The superior vena cava returns all of the blood to the heart from tissues superior to the heart in the head, neck, arms and upper thorax. Likewise, the inferior vena cava returns blood to the heart from tissues inferior to the heart, including the legs, abdomen and lower thorax.
Arteries. The arteries are major blood vessels connected to your heart. 1  The pulmonary artery carries blood from the right side of the heart to the lungs to pick up a fresh supply of oxygen. 2  The aorta is the main artery that carries oxygen-rich blood from the left side of the heart to the body.eins. The veins also are major blood vessels connected to your heart. 1  The pulmonary veins carry oxygen-rich blood from the lungs to the left side of the heart so it can be pumped to the body. 2  The superior and inferior vena cavae are large veins that carry oxygen-poor blood from the body back to the heart.