In this article we will discuss about the composite structure of a cell with the help of a suitable diagram. The living substance of plants and animals is described by the general term, protoplasm, which is bounded by a delicate membrane and contains various microscopic and submicroscopic structures. The smallest unit of protoplasm, capable of carrying out independent existence, is [...]
In this article we will discuss about the structural features of epithelial cell with the help of a suitable diagram. In many cell types, particularly in epithelial cells (Fig. 1.78) and other certain cells (cardiac and smooth muscle cells) show some modifications which are mostly related to their functions. These specialised structures are generally seen under electron microscope. In some [...]
The cells in the body of the multicellular animals vary in structure and function. It is seen that one variety of cell performs one kind of work and constitutes one type of tissue. Tissue may be defined as an aggregate of same type of cells combined by subserving the same general function independently and united by varying amounts of intercellular [...]