Assertion: umbilical cord | /r/MadeOf | two distinct umbilical veins
Facets:
Source sentences:
text: The umbilical cord in some mammals, including cattle and sheep, contains two distinct umbilical veins.
text: The umbilical cord in some mammals contains two distinct umbilical veins, rather than just one (as is the case for humans).
text: The umbilical cord in some mammals contains two distinct umbilical veins, rather than just one (as is the case for humans).
text: The umbilical cord in some mammals, including cows and sheep, contains two distinct umbilical veins.