[Solved] Using the bond dissociation energies given, calculate DH° for the following reaction. A)+3 KJ/mol B)-3 KJ/mol C)-67 KJ/mol D)+70 KJ/mol Hilum: A depression or fissure where structures such as blood vessels and nerves enter an organ. Urine Collects: Describes the process in the kidneys where the urine is accumulated in the renal pelvis before being passed into the bladder. Microscopic Structure: The detailed architecture of an object that is too small to be seen with the naked eye, often requiring a microscope for examination. Plane of Section: A specific direction through a body or structure to expose a surface for study.