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The general why answer would be as regards evolution - which predicts that cilia have evolved to behave as they do because it is, or has been, advantageous to the survival of an organism, or an ancestor of said organism, over other competing organisms.
I suspect you probably want to know the details of how as opposed to why cilia do their job.
The more subjective why answers would depend on the organism and would tend to refer to evolution also. For example, take the cillia in your wind pipe (trachea) which move in coordination to shift mucus and dirt out of your lungs and down your food pipe (oesophagus) - organisms which have this function would have better blood oxygen levels and be less succeptible to lung related illnesses through having cleaner lungs. Since cillia are found in the tracheas of the vast majority of other animals we can conclude that they evolved in a distant ancestor and provided an advantage to this ancestors survival (the reality is that the cillia we see today probably started at a much lower efficiency, but since higher efficiency cillia will be selected for it is easy to see why they are there today).
I hope this answers your question, because I can't really answer the how question without being vague.
What else can I help you with?
How does the parmecium move?
A paramecium moves by beating hair-like structures called cilia in a coordinated manner. These cilia create a flowing movement of water around the paramecium, propelling it forward in a characteristic spiraling motion.
What uses cilia to move?
Cilia are used by some single-celled organisms, such as Paramecia, for movement. In multicellular organisms, cilia can be found in the respiratory tract to help move mucus and in the fallopian tubes to help move eggs.
What are short hairlike projections used for locomotion called?
Short hairlike projections that are used for locomotion are called cilia. Cilia are normally found on unicellular organisms and not multicellular organisms.
What are Hair like structures that move materials along the outer surface of the cell?
Cilia and flagella are hair-like structures that protrude from the surface of cells and are involved in movement. They can help propel cells or move substances across the cell surface.
Cells lining the trachea have whiplike mortile extensions on their free surfaces What are their extensions what is their source and what is their function?
The whiplike motile extensions are called cilia. They are sourced from the basal body of the cell. The function of cilia in the trachea is to move mucus and trapped particles upward and out of the airway, helping to clear the respiratory tract.
Do Malaria parasites move by cilia?
No the parasites have no cilia.
How do protozoans move'?
Protozoans move with the help Pseudopodia, cilia and flagella. Pseudopodia - Amoeba Cilia - Paramaecium Flagella - Euglena
What structure allow the paramecium to move?
Paramecium moves using hair-like structures called cilia. These cilia beat in a coordinated manner to propel the organism through its environment.
How do sea cucumbers move?
when sea cucumbers are born they are born with cilia. Cilia helps them to move around.
How does bacilli move?
Cilia.
Does cilia move?
yes
Does bacilli move?
Cilia.
Why does Cilia move continously?
To move the mucus along.
How does the parmecium move?
A paramecium moves by beating hair-like structures called cilia in a coordinated manner. These cilia create a flowing movement of water around the paramecium, propelling it forward in a characteristic spiraling motion.
Why the cilia epithelium have more mitochondria them simple squamous?
The cilia need energy provided by the mitochondrion to move. The other cells do not move do not have the need for the same amount of energy.The cilia need energy provided by the mitochondrion to move. The other cells do not move do not have the need for the same amount of energy.
What is the function of the cilia in land snails?
the cilia draws water into the mantle cavity
What helps cell move?
Cilia and Flagella
