The cell is the structural and functional unit of living organisms. It was discovered by Robert Hooke in 1665.

National 5 Cell structure The functions of cell organelles Cells are microscopic building blocks of unicellular and multicellular living organisms.

The cell nucleus is the site of many important biological functions of the eukaryotic cell. These processes include transcription, replication, splicing and ribosome biogenesis.

The key features of cells and their functions - OCR 21st Century Plant cells All living organisms are made of cells. Some contain only one cell. Others are multicellular and contain many cells.