Structure
Organ systems
Groups of organs that work together, such as the circulatory, respiratory, digestive and urinary systems.
The lungs take in oxygen and remove carbon dioxide from the blood.Source: NHLBI
Structure
Groups of organs that work together, such as the circulatory, respiratory, digestive and urinary systems.
Structure
The heart pumps blood through blood vessels, carrying oxygen and nutrients around the body.
Molecule
The oxygen-carrying protein of red blood cells. Its beta chain is encoded by the HBB gene.
The explanations on this page are our own summaries of these sources. Follow a link to read the original; if anything here disagrees with it, the original wins. How we choose and check sources.
National Heart, Lung, and Blood Institute. nhlbi.nih.gov. National Heart, Lung, and Blood Institute, NIH.