The more important cell organelles are nucleus, which controls all the activities of the cell, plastids, which are involved in the formation and storage of carbohydrates, mitochondria, which are the power houses of the cell and supply all energy needed for the maintenance of life, endoplasmic reticulum, which performs an active role in protein synthesis, lysosomes, which are primarily rich in enzymes and are lytic in nature, Golgi bodies, which are secretory in nature and centrosome, which takes part in organization and function of spindle apparatus.