Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Extracellular matrix wikipedia , lookup
Cytokinesis wikipedia , lookup
Cell growth wikipedia , lookup
Endomembrane system wikipedia , lookup
Tissue engineering wikipedia , lookup
Cell culture wikipedia , lookup
Cellular differentiation wikipedia , lookup
Organ-on-a-chip wikipedia , lookup
Cell encapsulation wikipedia , lookup
The Discovery of Cells Biology Fall 2016 Question What invention revolutionized the discovery of cells and their organelles? The invention of the microscope made it possible for scientists to view and study cells. The Cell Theory • Cells- The basic units of all living organisms. The Cell Theory 1. All living things are made of one or more cells. 2. Cells are the basic units of structure and function in all living things. 3. All cells come from other cells. Electron microscopes- Allow objects to be magnified up to 500,000x using a beam of electrons instead of light. Scanning electron microscope (SEM)- can help scientists see a cell’s 3 dimensional shape. Transmission electron microscope (TEM)- allows scientists to see structures inside a cell. Types of Microscopes • Scanning probe microscopes- produce images by tracing surfaces of cells or structures with a probe. Types of Cells All cells contain small structures called organelles. Each organelle has a specific function in the cell. Two major classes of cells: 1. Prokaryotic Cell Lacks a nucleus and most other organelles Example: bacteria and archaea Types of Cells 2. Eukaryotic Cell • Has a nucleus surrounded by a membrane and other membrane bound organelles • Example: protists, fungi, plants, and animals