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?
-- Earth rotates on its axis at a rate of 15 degrees per hour -- Earth rotates 360 degrees in 24 hours -- The Earth rotates on its axis exactly once per day. If you are interested in knowing what this means in terms of miles per hour, that depends where on the globe you are measuring the speed of rotation.- The circumference of the earth at the equator is approximately 25,000 miles and it takes 24 hours for a full rotation. Therefore a point on the equator is spinning at a â¦ t just over 1000 miles per hour.