A lymphocyte is a type of white blood cell. White blood cells are part of your immune system and help your body fight off diseases, including infections and cancer. There are two main types of lymphocytes â B cells and T cells.
There are the inner, rocky planets and then the outer gas planets. Venus is a rocky planet, as are Mercury, Earth and Mars. The terrestrial (rocky) planets are the 4 inner (closest to the sun behind the asteroid belt) rocky worlds in the Solar System: Mercury, Venus, Earth and Mars. The Gas giants, well, they are Jupiter, Saturn, Uranus, and Neptune. The gas and rocky planets are separated by the asteroid belt.
The terrestrial planets of the Solar System: Mercury, Venus, Earth, and Mars, sized to scale. A terrestrial planet, telluric planet, or rocky planet is a planet that is composed primarily of silicate rocks or metals. Within the Solar System, the terrestrial planets are the inner planets closest to the Sun, i.e. Mercury, Venus, Earth, and Mars.