The bipotential hepatoblasts begin differentiating into biliary epithelial cells and hepatocytes. The spleen stores red blood cells and lymphocytes. Neurons differ in invertebrates from mammalian cells. This resulted in damage to both bacterial cells and human tissue. Tumours originating from the thymic epithelial cells are called thymomas. The surrounding stromal cells (fibroblasts) also proliferate. These were termed induced pluripotent stem cells (iPSCs). Organisms differ according to the number of constructed molecules in their cells. VWF binds to a number of cells and molecules. There are several pathways of communication between the endothelial cells and pericytes. Processes of tension such as stretching and relaxing increased differentiation into muscle cells. Lectins are similar to antibodies in their ability to agglutinate red blood cells. Communication between endothelial cells and pericytes is vital. The effect of glucocorticoids on Fc receptor expression in immune cells is complicated. Insulin signalling controls access to blood glucose in body cells.