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The Cell Theory.

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Presentation on theme: "The Cell Theory."— Presentation transcript:

1 The Cell Theory

2 Organization of Matter
Atoms- smallest unit of matter Examples: Carbon, Hydrogen, Oxygen Atoms come together to form…

3 Organization of Matter
Molecules- such as water, glucose,DNA Molecules come together to form…

4 Organization of Matter
Cells- smallest unit of life Cells come together to form…

5 Organization of Matter
Tissues- such as nervous tissue, muscle or bone Tissues come together to form…

6 Organization of Matter
Organs- such as heart, brain, or stomach Organs come together to form…

7 Organization of Matter
Organ systems- such as cardiovascular or nervous systems Organ systems come together to form…

8 Organization of Matter
Multicelled organisms- such as: plants, animals, fungi, humans

9 The History of Cell Discovery
Early 1600’s Galileo- 1st to record observations of magnified objects insect eyes

10 The History of Cell Discovery
1665 Robert Hooke- observed cork “dead cells filled with juices” Used the word “cell”- from the little rooms that monks lived in

11 The History of Cell Discovery
1670 van Leeuwenhoek observed living cells with microscope Looked at pond water-”animalcules”

12 The History of Cell Discovery
1820 Robert Brown observed spherical structure in cells “nucleus”

13 The History of Cell Discovery
1839 Schleiden observed plants under the microscope All plants were made of cells

14 The History of Cell Discovery
1839 Schwann observed animals under the microscope All animals were made of cells

15 The History of Cell Discovery
1850 Virchow observed cells under the microscope grow in size and divide in 2 cell division

16 The History of Cell Discovery
1950 Electron Microscope Magnifies 500,000x Beam of electrons Observe structures inside cells Virtual Electron Microscope

17 The Cell Theory The observations and conclusions of these and other scientists led to the development of The Cell Theory: All organisms are made of one or more cells. The cell is the basic unit of life. All cells come from pre-existing cells

18 All Cells Have in Common:
1. Plasma membrane- boundary 2. Cytoplasm-water and dissolved molecules Genetic material- DNA Ribosomes – the site of protein synthesis

19 Two Cell Types understanding size

20 Two Cell Types 1. Prokaryotes: Simpler
Genetic material is not contained in a nucleus. No organelles Ex. Bacteria

21 2. Eukaryotes More complex Genetic material contained in a nucleus
Organelles- Allow different parts to perform different functions Ex. Animal, plant, fungi and protist cells.

22

23 Eukaryotic Cell Structure


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