Blood

Blood is the bodily fluid of humans, animals and most alien species. When oxygenated, it appears red, although some alien species have a variety of different colors of blood. As an example, Ungarans have purple blood.

Murder is a crime that is often referred to as Bloodshed, which refers to spilling blood. Without blood, a person cannot live.

It is common in the medical field for patients with a low-blood count to receive blood transfusions.