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
Cell growth wikipedia , lookup
Extracellular matrix wikipedia , lookup
Cellular differentiation wikipedia , lookup
Tissue engineering wikipedia , lookup
Cell culture wikipedia , lookup
Cell encapsulation wikipedia , lookup
Organ-on-a-chip wikipedia , lookup
The Cell Theory Microscopes Provide the Windows to the World of the Cell The Men • Anton Van Leeuwenhoek (1600’s) • Credit for the first microscope • Looked at pond water and saw “wee beasties” Robert Hooke • Observed plant stems, wood, and cork (1600’s) • Saw all the tiny chambers and called them CELLS • What cell part did Hooke observe? • Cell Wall Robert Brown (1833) • Observed that cells had a dark structure within plant cells • Brown observed the nucleus Matthias Schleiden (1838) • Stated that all plants are made of Cells • Made many observations of plants around the area Theodor Schwann (1839) • Stated that all animals are made of Cells • Observed many animal tissues Rudolf Virchow (1855) • Stated that all cells come from pre-existing cells • Cells arise from the division of pre-existing cells The Cell Theory • All living things are composed of cells • Cells are the basic unit of structure and function in living things • All cells come from pre-existing cells Exceptions to the Cell Theory • Viruses – are not cellular • Mitochondria and chloroplast – each contain genetic material and can reproduce