* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download A typical animal cell The diagram below shows the typical structure
Survey
Document related concepts
Signal transduction wikipedia , lookup
Cell encapsulation wikipedia , lookup
Cytoplasmic streaming wikipedia , lookup
Biochemical switches in the cell cycle wikipedia , lookup
Extracellular matrix wikipedia , lookup
Cell membrane wikipedia , lookup
Confocal microscopy wikipedia , lookup
Cellular differentiation wikipedia , lookup
Cell culture wikipedia , lookup
Endomembrane system wikipedia , lookup
Organ-on-a-chip wikipedia , lookup
Cell growth wikipedia , lookup
Cell nucleus wikipedia , lookup
Transcript
A typical animal cell The diagram below shows the typical structure of an animal cell as seen under a light microscope. Cheek cells as seen under a light microscope The cell has a cell membrane which encloses the cell contents The contents consist of a central ball shaped nucleus surrounded by cytoplasm This nucleus contains fibrous material called chromatin This condenses during cell division to form chromosomes Chromatin contains DNA, the inherited material which controls the various activities inside the cell. Scattered within the cytoplasm are small rod like structures known as mitochondria. They have been described as the power-houses of the cell because they supply energy. Smaller dots within the cytoplasm are particles of stored food. The electron microscope Electron microscopes use a beam of electrons instead of a beam of light. Electron beams have a much smaller wavelength than light rays, so electron microscopes have greater resolving powers and can produce higher magnifications as a result. The diagram below shows sizes of objects that can b viewed with the naked eye, the light microscope, and the electron microscope.