VILLI Meaning and
Definition
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Villi refer to small, slender, finger-like projections or folds that are primarily found on the inner lining of certain organs, particularly the intestines. These tiny structures serve essential functions in facilitating the absorption and movement of nutrients and fluids within the body.
In the context of the digestive system, particularly the small intestine, villi greatly increase the surface area available for absorption. Each villus contains an extensive network of blood vessels and lymphatic vessels that aid in the absorption of nutrients from digested food. Inside the villi, specialized cells called enterocytes play a crucial role in the absorption process.
The structure of villi is characterized by a central lacteal, which is a lymphatic capillary, and a network of tiny blood vessels called capillaries. These blood vessels and lacteals transport and distribute absorbed nutrients throughout the body.
Villi are also present in other organs such as the respiratory system and the female reproductive system. In the respiratory system, the villi found in the lining of the trachea and bronchi help filter and trap particles and microorganisms to prevent them from entering the lungs. In the female reproductive system, villi are found in the fallopian tubes, aiding in the transport of the ovum towards the uterus.
Overall, villi are instrumental structures in multiple organ systems, enhancing the efficiency of absorption, secretion, and transport processes, crucial for maintaining optimal bodily functions.
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A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
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In anat., minute projections from the surface of a mucous membrane, giving the appearance of the nap of cloth; in bot., long straight hairs on the surface of a plant.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
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Other Common Misspellings for VILLI
Etymology of VILLI
The word "villi" comes from Latin. It is the plural of "villus", which originally referred to a shaggy growth of hair or wool. In medical terminology, villi are small finger-like structures that line certain organs in the body, such as the small intestine, and serve various purposes, including increasing surface area for absorption.
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