![]() ![]() Movement of the CSF is affected by the downward pull of gravity, the continual process of secretion and absorption, blood pulsations in contingent tissue, respiration, pressure from the veins, and head and body movements.Cerebrospinal fluid (CSF) has essential biochemical and mechanical functions. CSF is produced at a rate of around 500 ml/day there are estimates that there is approximately 125 mL to 150 mL of CSF in the body at any given time. The fluid is eventually absorbed into the veins it leaves the cerebrospinal spaces in a variety of locations, including spaces around the spinal roots and the cranial nerves. The CSF is continually produced, and all of it is replaced every six to eight hours. ![]() After originating in the ventricles of the brain, it is probably filtered through the nervous-system membranes (ependyma). The exact method of the formation of the CSF is uncertain. There are about 100 to 150 ml of CSF in the normal adult human body. CSF is slightly alkaline and is about 99 percent water. The fluid also transports metabolic waste products, antibodies, chemicals, and pathological products of disease away from the brain and spinal-cord tissue into the bloodstream. Conversely, if there is a decrease in the volume of matter within the cranium, as occurs in atrophy of the brain, the CSF compensates with an increase in volume. An increase in the volume of blood or brain tissue results in a corresponding decrease in the fluid. The fluid helps to maintain pressure within the cranium at a constant level. When an individual suffers a head injury, the fluid acts as a cushion, dulling the force by distributing its impact. Formed primarily in the ventricles of the brain, the cerebrospinal fluid supports the brain and provides lubrication between surrounding bones and the brain and spinal cord. SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!Ĭerebrospinal fluid (CSF), clear, colourless liquid that fills and surrounds the brain and the spinal cord and provides a mechanical barrier against shock.Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.Britannica Beyond We’ve created a new place where questions are at the center of learning.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians.COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today.Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more.Demystified Videos In Demystified, Britannica has all the answers to your burning questions.This Time in History In these videos, find out what happened this month (or any month!) in history.#WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives. ![]()
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