Presentation on theme: "“The smallest unit that can carry out all the processes of life.”"— Presentation transcript:
1 “The smallest unit that can carry out all the processes of life.” THE CELL“The smallest unit that can carry out all the processes of life.”
2 Discovery of the Cell ROBERT HOOKE First to observe cells. He examined cork cells.“These little boxes reminded him of the small rooms in which monks lived, so he called them cells.”
3 Discovery of the CellAnton van Leeuwenhoek – First person to examine living cells & father of microscopyMatthias Schleiden – “All plants are composed of cells.”Theodore Schwann – “All animals are composed of cells.”Rudolf Virchow – “All cells come from existing cells.”
4 The Cell Theory Schleiden, Schwann, & Virchow All living things are composed of one or more cells.Cells are organisms’ basic units of structure & function.Cells come from existing cells.
5 CELL DIVERSITY Cells range in size from .2 um to 2 m. Average plant & animal cells are 10 to 50 um in diameter.Cuboidal & spherical.
6 TYPES OF CELLSEukaryotes – Contains a nucleus and membrane-bound organelles.Prokaryotes – Lacks a nucleus. (bacteria)Organelle – A cell component that performs specific functions in the cell.