First 202 words of the document:
Reianna Shakil L6EFBiology23/09/12
Centrioles, Cilia and Flagellum
Organelle + Diagram Description Function
Centrioles Small, hollow cylinders, Involved with the
containing a ring of separation of
microtubules (tiny protein chromosomes during cell
cylinders). division (mitosis) - the
organization of the mitotic
spindle and in the
completion of cytokinesis.
Cilia Small, hair-like structures The microtubules allow the
found on the surface cilia to move. This
membrane of some animal movement is used by the
cells. In cross-section, they cell to move substances
have an outer membrane along the cell surface.
and a ring of nine pairs of
inside, with a single pair of
microtubules in the middle.
Flagellum Flagella on eukaryotic cells The microtubules contract
are like cilia but longer. to make the flagellum
They stick out from the cell move. Flagella are used like
surface and are surrounded outboard motors to propel
by the plasma membrane. cells forward (e.g. when a
Inside they're like cilia too sperm cell swims).
two microtubules in the
centre and nine pairs
around the edge.