how could you appreciate function of a tiny cell in a large body of an organism ?
Cell is the structural and functional unit of all living organisms. In multicellular organisms, cells group to form a tissue which performs a particular function. Tissue forms organs and organs form organ system. Different tissues perform different functions thus promotes division of labour. These cells allow one system to connect to another system, for example, hormonal system is under the control of hypothalamus. Thus nerve cells control hormonal system.