A B-double or consists of a prime mover towing two semi-trailers, where the first semi-trailer is connected to the prime mover by a fifth wheel coupling (aka 'converter dolly') and the second semi-trailer is connected to the first semi-trailer by a fifth wheel coupling.
1 Arteries. 2  Arteries are elastic vessels that transport blood away from the heart. 3  Pulmonary arteries carry blood from the heart to the lungs where oxygen is picked up by red blood cells. 4  Systemic arteries deliver blood to the rest of the body. 5  Veins. 6  Veins are elastic vessels that transport blood to the heart.
The pulmonary veins carry oxygenated red blood cells from the lungs to the heart. They also carry wastes in the form of carbon dioxide back to the heart from the body tissues. red blood cell red blood cells, or erythrocytes the job of the red blood cells is to carry oxygen to all your cells Hemoglobin-blood cells.ed blood cells carry oxygen by binding oxygen molecules to hemoglobin (an iron based molecule).   Yes. White blood cells fight infections and â¦ other germs, and palates clot cuts. You need to intake a certain amount of iron to collect the oxygen on your red blood cells.