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An increase in carbon dioxide causes tension of the arteries, often resulting from increased CO 2 output (hypercapnia), indirectly causes the blood to become more acidic; the cerebrospinal fluid pH is closely comparable to plasma, as carbon dioxide easily diffuses across the blood–brain barrier.
Failure of the barrier may occur in a pulmonary barotrauma.This can be a result of several possible causes, including blast injury, swimming-induced pulmonary edema, and breathing gas entrapment or retention in the lung during depressurization, which can occur during ascent from underwater diving or loss of pressure from a pressurized vehicle, habitat or pressure suit.
The blood–CSF boundary at the choroid plexus is a membrane composed of epithelial cells and tight junctions that link them. [14] There is a CSF-brain barrier at the level of the pia mater, but only in the embryo. [15] Similar to the blood–brain barrier, the blood–CSF barrier functions to prevent the passage of most blood-borne substances ...
Blood-testis barrier, the biological barrier between blood and testes; Blood-placental barrier, the biological barrier between a pregnant individual's blood and foetal blood (blood of one or more foetuses) Blood-CSF barrier, the biological barrier between blood and cerebrospinal fluid (CSF; also called brain fluid) Blood–spinal cord barrier ...
Cerebrospinal fluid (CSF) is a clear, colorless transcellular body fluid found within the meningeal tissue that surrounds the vertebrate brain and spinal cord, and in the ventricles of the brain. CSF is mostly produced by specialized ependymal cells in the choroid plexuses of the ventricles of the brain, and absorbed in the arachnoid granulations .
The blood–brain barrier (BBB) is a highly selective semipermeable border of endothelial cells that regulates the transfer of solutes and chemicals between the circulatory system and the central nervous system, thus protecting the brain from harmful or unwanted substances in the blood. [1]
The major function of the lungs is gas exchange between the lungs and the blood. [67] The alveolar and pulmonary capillary gases equilibrate across the thin blood–air barrier . [ 34 ] [ 68 ] [ 69 ] This thin membrane (about 0.5 –2 μm thick) is folded into about 300 million alveoli, providing an extremely large surface area (estimates ...
Studies suggests that tanycyte cells bridge the gap between the central nervous system (CNS) via cerebrospinal fluid (CSF) to the hypophyseal portal blood. [ 8 ] [ 9 ] Tanycytes provide a link that is both structural and functional between the CSF and the perivascular space of the hypophyseal portal vessels. [ 3 ]