Assertion: red blood cell | /r/MadeOf | hemoglobin
Facets:
Source sentences:
text: It is covered with a membrane composed of lipids and proteins, lacks a nucleus, and contains hemoglobin—a red iron-rich protein that binds oxygen.
text: Red blood cells, or erythrocytes, contain the hemoglobin that carries oxygen and carbon dioxide around the body.
text: Red blood cells, which transport oxygen from the lungs to all of the body’s tissues, contain hemoglobin, an iron-rich protein that binds oxygen.
text: For example a red blood cell contains hemoglobin that allows it to carry oxygen.