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?
Best Answer: The Earth revolves around the Sun, it doesn't rotate around the Sun. It makes one revolution every 365.25 days. That's why we have a leap year every 4 years.he planet is tilted at an angle of 23.5' and its spinning axis is 23.93 hours and to orbit the sun it takes 365.26 days. the earth is 93 million miles away from the sun (149.6 million km). big bounce Â· 8 years ago. Thumbs up.