xix.1. What is a Cell?
The cell is the fundamental structural and functional unit of all living organisms. According to the postulates of the cell theory, a cell is what gives everything life and is capable of performing all the essential tasks of an organism.
A cell may duplicate itself on its own. As a result, they are referred to as the foundation of life.
The cytoplasm, a fluid found inside every cell, is surrounded by a membrane. Many substances like proteins, nucleic acids, and lipids are also found in the cytoplasm. In addition, cell organelles are suspended in the cytoplasm of the cell.
Cells are complex, and their constituents serve a variety of tasks in an organism. Similar to constructing bricks, they come in a variety of sizes and shapes.
Living organisms are made up of cells of different shapes and sizes. In addition, it gives structure to the body and converts nutrients into energy.
The first live cell was observed and described by Anton Von Leeuwenhoek. The nucleus was later discovered by Robert Brown. All the cell’s structural features were revealed thanks to the advent of the microscope and its advancement into the electron microscope.