The word "cilia" is spelled with a "c" and an "i" followed by an "l" and an "i" and then an "a." Its IPA transcription is ˈsɪliə. The "c" is pronounced as a "s" sound, and the "i" sounds like "ih." The "l" is pronounced like "l," and the second "i" is pronounced like "ee." Lastly, the "a" is pronounced like "uh." This word refers to hair-like appendages that protrude from cells and are responsible for various processes such as movement and sensing.
Cilia are slender and hair-like structures found in the cells of many multicellular organisms. These microscopic projections are often quite numerous and can be found on the surfaces of certain cells or grouped together in specialized structures called ciliated epithelia. Cilia come in different lengths and can vary in size, but they are usually around 5 to 10 micrometers long.
The primary function of cilia is to facilitate movement, specifically in a rhythmic pattern. They have a remarkable ability to beat back and forth, generating fluid movement or propelling certain substances along surfaces. Cilia are vital for various biological processes, including the clearance of mucus in our respiratory system, the movement of eggs through the female reproductive tract, and the transport of nutrients and waste materials in various organs.
Structurally, cilia are composed of microtubules arranged in a characteristic 9+2 arrangement, where nine outer doublet microtubules surround a central pair. This specific arrangement gives the cilia their distinctive appearance under a microscope.
Cilia can be found in diverse organisms, ranging from single-celled organisms to complex animals like humans. They play a crucial role in maintaining the health and proper functioning of various systems within organisms. The ability of cilia to move with a coordinated motion allows for efficient flow of fluids and particles, enabling important physiological processes.
Plural of cilium.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The hair of the eyelids; hairs on the margin of any body; thin hair like projections from an animal membrane which have a quick vibratory motion-in the smaller animals and insects only seen by the microscope.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
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The word "cilia" derives from the Latin term "cilium", which means “eyelash.” The plural form "cilia" is used to refer to the tiny hair-like structures found in various organisms. These structures are often similar in appearance to eyelashes, which led to the naming of cilia.