(our planet, whose interior is very hot but whose exterior is not so hot; a minor planet with major problems; and a jigsaw puzzle with a peace missing)

(Latin: internal organs; all that is under the skin, all parts in the body except flesh or muscles; entrails; any large interior organ in any of the three great cavities of the body; specifically, those within the chest; such as, the heart or lungs; or in the abdomen; such as, the liver, pancreas, and intestines; and in the head; such as, the brain)