1 The spleen is the largest organ of the lymphatic system. 2  Its primary function is to filter blood of damaged cells, cellular debris, and pathogens. 3  Like the thymus, the spleen houses and aids in the maturation of lymphocytes. 4  Lymphocytes destroy pathogens and dead cells in the blood.he lymphatic system plays a vital role in the proper functioning of the body. One of the major roles of this organ system is to drain excess fluid surrounding tissues and organs and return it to the blood. Returning lymph to the blood helps to maintain normal blood volume and pressure.
More Americans believe aliens have visited Earth than believe that Jesus is the Son of God. According to a National Geographic survey, 77 percent of all Americans believe there are signs that aliens have visited Earth, and according to a recent Harris poll only 68 percent of all...
Every time we pass another population milestone â at the moment, weâre tallying a whole-Earth total of 7 billion â the question arises: How many people have ever lived on the planet? The Population Reference Bureau, or PRB, has an answer for that. (Make your guess now; the answer will appear lower down.) But itâs heavily qualified, and thereâs a story behind it. The story starts sometime in the 1970s, when a notion came into common conversation that the population was growing so fast that 75 percent of the people who had ever lived on Earth were currently alive.