Everything You Need To Know About Cells
All animals and plants you see in the environment are composed of cells. The cell was discovered by Robert Hooke in 1665 and it was first examined under a microscope by Antony van Leeuwenhoek (1674). The cell is considered to be the building block of every living being. The number of cells in an animal body depends on the size of the animal. Small organisms contain a lesser number of cells compared to larger organisms.
Microscopic organisms that are not visible to your naked eye are composed of a single cell and are known as ‘unicellular organisms’ (Eg. bacteria). Larger organisms are built from millions of cells and are known as ‘multicellular organisms’ (Eg. animals and plants).
The cells of every organism share common features with each other and are specialized with certain structures and functions. Therefore, a cell is the basic structural and functional unit of life. All the cells of an organism work in unison; they move, respire, grow and develop, require nutrition, reproduce, control, respond to stimuli and excrete.
Instead of placing one long blog entry that would give your finger a cramp from all the scrolling you would have to do, I’ve broken it down into a series of entries. Follow along at your own pace: