Lecture notes are intended to help the student organize their notes and facilitate assimilation of the material. The cell is the most basic living organism.
Some organisms are one-celled organisms, like amoebas and bacteria.
The CELL is defined as the basic living structural and functional unit of all living organisms. You can think of cells as the structural units of the body, as bricks are the structural units of a house. The cell is also the functional unit of the living organism. All functions that occur within tissues and organs take place at the cellular level. Cells are microscopic in size and are measured in metric units called micrometers.