Assertion: plasma's protein | /r/HasProperty | soluble
Facets:
value: in the blood
type: LOCATION
value: freely
type: MANNER
value: in many invertebrates
type: OTHER
Source sentences:
text: In many invertebrates, these oxygen-carrying proteins are freely soluble in the blood; in vertebrates they are contained in specialized red blood cells, allowing for a higher concentration of respiratory pigments without increasing viscosity or damaging blood filtering organs like the kidneys.