Hairy Tcell Definition Three part theory about cells 1 All living things are made of cells Part 2 of the Theory 2 The cell is the basic structural and functional unit of life Part 3 of the Theory ID: 530632
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Slide1
The Cell Theory
Hairy T-cellSlide2
Definition= Three part theory about cells
1. All living things are made of cells.Slide3
Part 2 of the Theory2. The cell is the basic structural and functional unit of life. Slide4
Part 3 of the Theory3. All cells come from pre-existing cells.
yeast cells dividingSlide5
Who came up with this theory?1. Schleiden (circa 1838)
All plants are made of cells!
Onion skin cellsSlide6
2. SchwannWho came up with this theory?
All animals are made of cells
!
Human red blood cellsSlide7
Who came up with this theory?3. Virchow
All cells come from pre-existing cells!Slide8
How big are cells?Microscopic (mostly)Measured in microns µm
(micrometers). A µm is one millionth of a meter = 10-9 m = one thousandth of 1 mm.Slide9
How big are cells?Smallest free-living cell =
Mycoplasma genitalium Size = 0.2 to 0.3 µm Slide10
How big are cells?Bacteria e.g. Eschericia coli (aka E.coli)Size=1 µm by 3 µmSlide11
How big are cells?Human red blood cell = 8 µm in diameterSlide12
How big are cells?Largest cell on the human body = ovum
Size= 1000 µm in diameter (1 mm)Slide13
How big are cells?Smallest cell in the human body = sperm cell. Slide14
How big are cells?Largest cell with a metabolism = Chaos chaos
Size=1-5 mm in length. common name = Giant Amoeba
Chaos diffluens
, is an
amoeba
closely related to the
giant
amoebaeSlide15
How big are cells?Largest cell = yolk of an ostrich eggSlide16
Ostrich, egg, humansSlide17
Ostrich emerged from eggSlide18
How can we study cells?Problem:They are microscopic!
Solution:Use a microscope!Slide19
Types of MicroscopesCompound light microscope
Light passes through lenses to magnify image up to 1000XCan observe living cellsSlide20
Types of Microscopes2. Electron microscope
Uses a beam of electrons to magnify image > 1000XKills cells being observedSlide21
Common features of all cellsSmall size – allows materials to move via diffusionDiffusion
= process by which molecules move from levels of high concentration to levels of low concentration until equilibrium is reachedSlide22
DiffusionGoogle Image Result for http://www.indiana.edu/~phys215/lecture/lecnotes/lecgraphics/diffusion.gifSlide23
Common features of all cells1. Cell Membrane – selectively/differentially permeable (lets some things in and out)Slide24
Common features of all cells2. Cytoplasm – semi-fluid material in which cell organelles floatSlide25
Common features of all cells3. Nucleic acid containing genetic code :
Which nucleic acid?DNASlide26
Common features of all cells4. Cytoskeleton – proteins that support the cell
(Microtubules & microfilaments)Slide27
Common features of all cells5. Ribosomes
– make proteinsSlide28
If Cells could be really big ……
Star Trek - The Immunity SyndromeSlide29
Bibliographyhttp://www.hotlinecancer.com/?cat=28http://news.bbc.co.uk/1/hi/sci/tech/4636121.stm
http://www.thebacteriabusters.com/eColi.htmlhttp://www.lungcancer.co.uk/how.htmhttp://www.fi.edu/learn/heart/blood/red.htmlhttp://biology.about.com/library/weekly/aa091400a.htmhttp://www.pbs.org/wgbh/amex/babies/peopleevents/e_ovum.htmlhttp://www.dkimages.com/discover/Home/Animals/Birds/Growth-and-Development/Ostrich/Ostrich/Ostrich-15.html
http://www.flickr.com/photos/71751551@N00/1262329163/
http://commons.wikimedia.org/wiki/Image:Ostrich_egg.jpg
http://www.mambalam.net/slideshow.php?set_albumName=Animalia
http://strangebenevolent.blogspot.com/2007/07/meerkats-and-ostriches.htmlwww.madsci.org/posts/archives/dec97/878139903.Cb.r.html http://en.wikipedia.org/wiki/Amoeba_proteushttp://en.wikipedia.org/wiki/The_Immunity_Syndrome_(Star_TrekSlide30
Bibliographyhttp://www.pacpress.com/level3/micron.htmGoogle Image Result for http://www.indiana.edu/~phys215/lecture/lecnotes/lecgraphics/diffusion.gif
http://commons.wikimedia.org/wiki/Image:Diffusion.jpghttp://library.thinkquest.org/C004535/cell_membranes.htmlhttp://sun.menloschool.org/~cweaver/cells/e/ribosomes/
http://www.elmhurst.edu/~chm/vchembook/580DNA.html
http://sciencecity.oupchina.com.hk/biology/student/glossary/cytoplasm.asp
http://www.uic.edu/classes/bios/bios100/lecturesf04am/lect06.htm