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Cilia are classified as either mole or non-mole. Motile cilia, or moving
cilia, can be found in the respiratory tract, middle ear, and other body systems.
They move in a wave-like rhythmic moon to keep sensive internal passageways
free of mucus or foreign parcles. The non-motile cilia, or non-moving cilia, play
a crucial role in many different organs. For example, cilia in the kidney are
forced to bend as urine flows past, which sends signals to the cells that urine
is flowing. Non-mole cilia inside the eye are housed in the rena's
photoreceptors, allowing important molecules to be transported from one end
to the other.
Figure 23. Flagella and Cilia
Source: http://academic.pgcc.edu/~kroberts/Lecture/Chapter%203/03-28_Flag-Cil-Motion_L.jpg
Microvilli are ny lile projecons that exist in, on, and around cells. They
can exist on their own or in conjuncon with villi. The lining of the small intesne
has ny folds that project out like numerous fingers called villi. On each of the
villi, there are even smaller folds that sck out like fingers called microvilli.
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