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?
The Earth rotates on its axis with a period of 0.9972 days. The Sun rotate â¦ s on its axis with a period of 25.05 days. All periods are reported in Earth days, and are sidereal time, which is the time for rotation relative to the distant stars.he sun and earth are exerting a gravitational pull on each other, but at the same time the angular vel â¦ ocity of the earth stops us falling into the sun. These two opposing forces allow the earth to stay in orbit around the sun. The same mechanism occurs with the moon and earth system, but on a smaller scale.