Cell Organization and Cell Theory
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15 Terms
cell
The basic unit of life in all living things.
tissue
A group of similar cells working together to do a specific job.
organ
A group of tissues working together to do a specific job (heart, lungs).
organ system
A group of organs working together to do a specific job (digestive system, respiratory system).
organism
A independent, living thing.
Robert Hooke
Discovered and named the cell looking at cork. 1665
Theodor Schwann
German scientist who concluded all animals are made of cells. 1839
Anton van Leeuwenhoek
Discovers bacteria in teeth scrapings. Father of the Modern Microscope. 1675
Matthias Schleiden
German botanist who concludes all plants are made of cells. 1838
Rudolf Virchow
German doctor concludes that all cells come from pre-existing cells. 1858
The Cell Theory
1. All organism are made of one or more cells.
2. The cell is the basic unit of life in all living things.
3. All cells come from pre-existing cells.
Red blood cell
Small, smooth, round and able to carry oxygen easily through small blood vessels.
Nerve cell
Long branching parts allow it to easily transmit messages to other cells/areas of the body.
Muscle cell
long, slender and stretchy for movement.
cellular organization
cell - tissue - organ - organ system - organism