Insulin. Insulin is a hormone made by the beta cells in the pancreas. It is the key that opens the doors of cells and allows glucose to get into the cell. Each cell needs glucose to function. Carbohydrates in food are broken down into glucose which enters the blood stream.
The pericycle is a cylinder of parenchyma or sclerenchyma cells that lies just inside the endodermis and is the outer most part of the stele of plants.
any composite plant of the genus Aster, having rays varying from white or pink to blue around a yellow disk. 2. a plant of some allied genus, as the China aster. 3. Cell Biology. a structure formed in a cell during mitosis, composed of astral rays radiating about the centrosome.