Northumberland County Schools Mission Statement. The mission of the Northumberland County Schools, in collaboration with parents, educators, and community members is to provide our students with the skills and knowledge necessary to enable them to succeed in an ever changing and competitive world.orthumberland County Schools Mission Statement. The mission of the Northumberland County Schools, in collaboration with parents, educators, and community members is to provide our students with the skills and knowledge necessary to enable them to succeed in an ever changing and competitive world.
Heterotopia are nodules or clumps of misplaced neurons that did not move to the correct location in the brain during earlydevelopment. Heterotopia are common malformations of cortical development.
  Heterogeneous means that there are different compounds in a sample. Heterogeneous is a term used with mixtures and the way I like to think about it is: If you have che â¦ erios, apple jacks, and coco puffs in a bowl you have a heterogeneous mixture because you can physically separate the cereals from each other. heterogeneous echotexture of the uterus means that the muscular  tissue appears varied when viewed by ultrasound. This is an  abnormality that is typically caused by fibro â¦ ids or excessive  growth of endometrial tissue. 1 person found this useful.