b'SECTION 1: WHAT IS LYMPHEDEMA (LE)?If everything is working well, the blue and green trains are on time and there are enough seats for all those morning passengers to return home.All the tracks (red, blue, and green) are managed by the B&L Line.The veins and lymphatics are constantly picking up cells and proteins and returning them to the heart.Together, the arteries, veins, and lymphatics make up the bodys vascular system which transports blood & lymph (B&L) to and from the heart.12 UNDERSTANDING LYMPHEDEMA: KEEPING THE TRAIN ON TRACK SECTION 1: WHAT IS LYMPHEDEMA (LE)? 13'