Cilia and Flagella
By Morgan Brady
Evolution
 Centrioles produce basal bodies
 Ex: the development of sperm cells
 Basal body in the cytoplasm
 Cilia and Flagella grow
 Remains attached to it
 Production is continued
Function
 Single-celled organisms
 Locomotion
 Ex: sperms swimming
 Multi-celled organisms
 Move cells
 Transports fluid or materials past cells
 Ex: respiratory tract in humans
 Generates water currents to carry food
http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/bio%20101/bio%20101%20lectures/cells/cells.htm
• Paramecium
- Locomotion
http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/bio%20101/bio%20101%20lectures/cells/cells.htm
• Human respiratory tract
- Move mucous and debris
Where are they found?
 Cilia
 Animal cells (some)
 Protist cells
 Prokaryotes
 Flagella
 Animal cells (some)
 Prokaryotes
 Plant cells (some)
Structure
 Cilia: great numbers
 Flagella: solitary
 Hair- like
 Contain cytoplasm
 Enclosed by the plasma membrane
 9+2 arrangement
http://www.google.com/imgres?imgurl=http://micro.magnet.fsu.edu/cells/ciliaandflagella/images/ciliaandflagellafi
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Movement
 Cilia
 Smooth
 Move almost simultaneously
 Wave-like patterns of motion
 Flagella
 Whip-like
 Breast stroke in swimming
• Movement:
• Activation of dynein arm
• Bending of the axoneme
http://www.google.com/imgre
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Video
http://www.northland.cc.mn.us/biolog
y/biology1111/animations/flagellum.h
tml
Works Cited
 Michael W. Davidson. Micromagnet. October 1, 2000. 18
March 2011.
 Michael J. Gregory. Biology Web. April 18, 2006. 20
March 2011.
 Rnc. January 7, 2011. 18 March 2011.
 Textbook