This unit deals primarily with the cellular basis of life. It looks into the classical cell theory, viruses, the prokaryotic and the eukaryotic cell, cell-division and cell-cycle. It also explores the scientific developments of microscopy and other experimental methods in cell biology which have produced significant advances in our knowledge of cellular structure. The structural complexity of eukaryotic cells is reviewed and the significance of the diversity of membranous structures is given importance. This units also delves into the relationships between the chemical structures and functions of these membranes. The models of cell membranes are discussed in view of their role and functions in the biological processes of a cell. The unit introduces the way the body performs in a highly coordinated way via the complex levels of organisation of tissues, organs and body systems. So, it focuses at how groups of cells of similar structure and function assemble to form tissues, performing specific functions benefitting the living body. This unit gives a holistic overview of different eukaryotic cells and tissues, focussing mainly on flowering plants and the human being. It also introduces the common anatomical terms related to body regions and cavities, planes and location with special reference to the human body. An appreciation of the evolutionary trends in the complexity of organisation within the realm of biodiversity is central in the outcome of this unit. 

By the end of this programme, participants should be able to: