the diameter of RBC is bigger than blood capillaries, then how they passes through blood capillaries?
Please give the suitable reason.
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A capillary is like a vein - basically a tube. The blood cells pass down the tube. The walls of the capillary are only one cell thick (endothelial cells) - which have spaces between them so stuff from the blood diffuses through the holes in the capillary to the cells beyond the capillary (e.g. liver cells).
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So yes, veins connecting capillaries contain blood cells, they just narrow down in size to become capillaries.
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A capillary is just big enough for a red blood cell to fit through - but they have to go in single file.
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Nutrients just diffuse through the spaces between the capillary cells. The spaces are big enough to allow small molecules (and some are large enough for larger proteins to fit through).
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Nutrients that are specifically for the endothelial cells to function are taken up by the cells of course via various active and passive processes.
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Hope that makes things a bit clearer⤴️
________________________________
A capillary is like a vein - basically a tube. The blood cells pass down the tube. The walls of the capillary are only one cell thick (endothelial cells) - which have spaces between them so stuff from the blood diffuses through the holes in the capillary to the cells beyond the capillary (e.g. liver cells).
________________________________
So yes, veins connecting capillaries contain blood cells, they just narrow down in size to become capillaries.
_______________________________
A capillary is just big enough for a red blood cell to fit through - but they have to go in single file.
_______________________________
Nutrients just diffuse through the spaces between the capillary cells. The spaces are big enough to allow small molecules (and some are large enough for larger proteins to fit through).
________________________________
Nutrients that are specifically for the endothelial cells to function are taken up by the cells of course via various active and passive processes.
_______________________________
Hope that makes things a bit clearer⤴️
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