The thymus is positioned in the upper chest cavity above the heart. Thymus. The thymus gland is the main organ of the lymphatic system. Located in the upper chest region, the primary function of this gland is to promote the development of specific cells of the immune system called T lymphocytes. T lymphocytes or T-cells are white blood cells that protect against foreign organisms (bacteria and viruses) that have managed to infect body cells.
How long does it take for the Earth to rotate on its own axis ? The time it takes the Earth to rotate once is called a day (24 hours). The actual rotation time is a little less, about 23 hours and 56 minutes. Why do we have Day and Night?
Share to:   Yes the earth revolves around the sun it takes the earth 365 days/a year to make a full revolution. The earth also rotates around its axis, it takes the earth 24 hours/ â¦ a day to make a full rotation. If the earth did not revolve on its axis, we wouldn't have day or night.s the earth revolving slow or fast around the sun? The Earth spins on a 23.5 degree angle and takes 24 hours to do one spin or 23hours and 56 minutes to be exact. But the earth takes 365.5 days (year) to do a complete circuit â¦ of the sun.