Bloodworms have a creamy pink color, as their pale skin allows their red body fluids that contain hemoglobin to show through.

If the sample contains hemoglobin, it will turn pink.

This is considered a positive test and indicates that the sample contains hemoglobin and, therefore, is likely blood.

Red blood cells contain hemoglobin, a protein that carries oxygen in the blood.

Contrary to the case in most other molluscs, the blood of ram's-horn snails contains hemoglobin.

Anemias are classified by the size of red blood cells, the cells that contain hemoglobin in vertebrates.

Some nonerythroid cells (i.e., cells other than the red blood cell line) contain hemoglobin.

Red blood cells contain hemoglobin, which is broken down to heme and globin.

The red type contain hemoglobin and carry oxygen, but the function of the other pigments is unknown.

The central nervous system is often red or pink because it contains hemoglobin.