Why Does Cockroach Have White Blood?

Most insects have blood that is yellow or green. Cockroaches are no exception. They also don’t have hemoglobin or red blood cells, and their blood consists of a fluid called hemolymph. This fluid contains white blood cells called hemocytes and corpuscles, which circulate throughout the insect body just like blood does.

Cockroaches don’t have a heart, so their blood floats around their body. Their blood supply travels to the organs and tissues they need to survive. Moreover, their digestive system provides the energy needed to move the blood throughout their body. However, the white blood they produce is not what we’re used to seeing.

The colour of cockroach blood is derived from their hemolymph. Cockroach blood contains no hemoglobin, which is the respiratory protein that gives human blood its red color. The resulting hemolymph also does not flow the way human blood does or seeps like vertebral blood. It consists of a combination of water, ions, amino acids, and fats. It also has a low viscosity.

Cockroaches do have white blood, but not red blood. The hemolymph in cockroaches is mostly colorless, and varies in color from yellow to orange depending on their developmental stage. In fact, it is not unusual to see a cockroach with white blood as a result of molting, which can take several hours or even days. The only change in color is the color of the hemolymph during the egg-laying stage.