Assertion: iron's role | /r/HasProperty | key
Facets:
Source sentences:
text: Iron plays a key role in the making of red blood cells , which carry oxygen.
text: The Iron is the most common limiting element that have a key role in structuring phytoplankton communities and determining its abundance, it's particularly important in the HNLC (High-nutrient, low-chlorophyll regions), where the presence of micronutrients is mandatory for the total primary production, and Iron is considered one of those limiting factors.
text: Iron plays a key role in providing strength to the immune system.
text: Iron is one of the main components of the proteins in your body and it plays a key role in oxygen transport, too.
text: Iron plays a key role in oxygen transport and healthy blood.