Cell - The Unit of Life

This topic defines cells and discusses the discovery of cells. It explains in detail the characteristics, types and functions of a cell. We will also study the structure of a cell with the aid of a diagram.

This topic discusses the shapes and sizes of the cell with the aid of diagrams. We will learn the factors affecting the size and shape of a cell. Some significant facts related to the shapes and sizes are also provided here.

This topic explains cell theory given by Matthias Schleiden in 1838. We will learn that all living organisms are composed of cells and all cells arise from pre-existing cells.

This topic explains the need for energy flow in cells. It discusses the pathway of energy flow and transfer with the aid of flowchart and diagrams. A brief note on cellular totipotency is also given here.

This topic sheds light on prokaryotic and eukaryotic cells. It discusses their occurrence, size, shape and several modified structures with the aid of diagrams. We will also learn the differences between prokaryotic and eukaryotic cells.

This topic discusses the structure and functions of the cell membrane with the aid of a diagram. It briefs on the fluid mosaic model and its functioning. The fluidity of the membrane is also explained here in detail.

This topic encompasses the structure of the cell wall with the aid of a diagram. It describes their functioning in contributing protection and stability to the organelles and cells. It also discusses the chemical composition of a cell wall.

This topic discusses in detail the structure and functions of different cell organelles. It explains their occurrence, shape and size with the aid of labelled diagrams. A brief note on the classification of cell organelles is given here.