erythrocyte morphology trait erythrocyte molecular composition trait 2021-08-06T14:52:21Z Any measurable or observable characteristic related to the proportions of proteins, minerals, nutrients, gases, or other substances in the erythrocyte, the fetal or adult cell in the blood that carries oxygen. EFO:0009703 EFO:0801584 EFO:0801585 Trait.ontology VT:0010939 caripark