Cell – Structure and Function Class 8 Notes – Chapter 8
A cell is the basic structural unit of an organism. The cell was first discovered by Robert Hooke, until then very little was known about the cell. Cells are assembled to make the body of an organism. Organisms made of more than one cell are known as multicellular organisms while single-celled organisms are known as unicellular organisms.
The functions of organisms with a lesser number of cells are not affected by less number of cells. A single-celled organism like the amoeba respires, captures and digests food, grows, excretes and reproduces. Similar functions in a multicellular organism are carried out by groups of specialised cells forming different tissues. Tissues, in turn, form organs. A cell exhibits a variety of shapes and sizes. Please refer Cell Structure and Functions Class 8 Notes for more revision notes.
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