<Tr> <Th> MeSH </Th> <Td> D011690 </Td> </Tr> <Tr> <Th> TA </Th> <Td> A12. 1.06. 008 </Td> </Tr> <Tr> <Th> FMA </Th> <Td> 76538 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr>

When do the fibers of blood become visible