18. Figures 11-8 and 11-9 on pages 216 and 217 illustrate the location of the most important arteries and veins of the body. The veins are shown in Figure 11-8 and the arteries are shown in Figure 11-9. (A) Color the veins blue and then identify each vein provided with a leader line on the figure. (B) Color the arteries red and then identify those indicated by leader lines on the figure. (C) Indicate with arrows the direction of blood flow toward or away from the heart in Figures 11-8 and 11-9. Place arrows next to the blood vessels. Note: If desired, the vessels identified may be colored differently to aid you in their later identification.