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.
Flowers arise from a modified stem called the receptacle. Four types of modified leaves, are arranged in whorls or spirals from the receptacle. The first group called the calyx is made of sepals. Sepals are usually green and rather tough to protect the more delicate parts of the flower bud.