Vitamin D3, also known as cholecalciferol, comes from fortified foods, animal foods (fatty fish, cod liver oil, eggs, and liver), supplements, and can be made internally when your skin is exposed to ultraviolet (UV) radiation from the sun. Structurally, these two are not the same.
Definition of mind for Students. 1  1 : the part of a person that thinks, reasons, feels, understands, and remembers. 2  2 : memory 1 Keep my advice in mind. 3  3 : intention 1 I changed my mind. 4  4 : a person's view or opinion about something Speak your mind.
THE BRAIN. The Brain is the instrument of the mind, the body is the servant of the mind. The Brain is the most complex part of the nervous system. The Brain is surrounded and protected by the bones of the skull, by the meninges, and by the cerebrospinal fluid. The human brain is made of many parts.Each part has a specific function.