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Blood

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Multiple realities
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Romulan corpse, generations

A Romulan with blood on his face

Nanoprobes in action

Nanoprobes assimilating blood cells

Blood is the circulatory fluid that runs through most corporeal lifeforms in the universe. Its primary function is to carry nutrients and respiratory gases to cells and to remove waste products. Blood transfusions can only be undertaken between individuals with the same blood composition.

Many drugs need to be introduced into the bloodstream to take effect. Anesthetic agents, for instance, are intravenously administered.

In 2267, Rigelian scientists developed a drug that could accelerate the reproduction of blood. (TOS: "Journey to Babel")

The Klingon spy J'Dan found a way to smuggle stolen information, encoded in amino acid sequences, in the bloodstream of an unknowing third person. (TNG: "The Drumhead")

When experimenting on crewmembers of the USS Enterprise-D, solanogen-based lifeforms slowly turned Lieutenant Edward Hagler's blood into a liquid polymer, thereby killing the officer. (TNG: "Schisms")

Some species did not have blood at all, like the humanoid Breen. (DS9: "In Purgatory's Shadow")

Klingons swore blood oaths as a promise of vengeance, to sanctify various alliances, and as vows by the shedding or mixing of blood. (DS9: "Blood Oath")

T'Pol had Vulcan K cells in her blood. These cells stopped her from being infected with a mutagenic virus on the Loque'eque homeworld in 2153 (ENT: "Extinction")

Both Spock and Sarek had type T-negative blood, which was a rare Vulcan type. (TOS: "Journey to Babel")

As late as 2267, blood was taken with a needle for medical tests. (TOS: "The Deadly Years")

Julian Bashir had type B-negative blood. (DS9: "In Purgatory's Shadow")

Odo had type O-negative when he was a humanoid for a short time. (DS9: "Broken Link")

It was Solbor's blood that revealed the text of the Book of the Kosst Amojan. (DS9: "The Changing Face of Evil")

Blood chemistryEdit

Vulcan cut and bruise

A green Vulcan cut and bruise

Bolian blood

A sample of Bolian blood

Na'kuhl blood

Yellowish Na'kuhl blood

Blood chemistry is a term used to describe the composition of elements, chemicals, and other substances in a person's blood. The chemistry of the metal-protein complex of the component cells responsible for respiratory delivery influence the color of the blood.

Known colors and chemical compositions included:

It is not known what color blood Gosis' people had, only that it was not red. It was also not iron based though what it was based on is also unsaid. (ENT: "The Communicator")

Rigelians were known to share a similar blood chemistry to that of Vulcans. (TOS: "Journey to Babel")

Acamarian blood was composed of an odd composite of iron and copper-based blood chemistry. (TNG: "The Vengeance Factor")

Bolians had a blood chemistry very different from that of other species, especially Vulcans. If a blood transfusion was given from a Vulcan to a Bolian it would result in the death of the Bolian. There were instances when artificial blood was unavailable and existing blood cells were genetically altered for inter-species transfusions to be successful. (VOY: "Prototype")

In 2367, Dr. Beverly Crusher noticed that Lieutenant Commander Susanna Leijten's blood chemistry was slightly off after beaming back from the surface of Tarchannen III. It was later discovered that she was in fact being transformed into another lifeform. (TNG: "Identity Crisis")

When creating the Jem'Hadar, the Founders deliberately omitted a key isogenic enzyme from their blood chemistry, giving it to them in the form of ketracel-white. The Jem'Hadar needed to keep taking the white or they would die, thus ensuring their loyalty to the Founders. (DS9: "The Abandoned")

In 2371, the USS Voyager's EMH discovered that Ensign Seska's blood chemistry was not consistent with that of a Bajoran. Her cover story was that she suffered from Orkett's disease as a child during the Occupation of Bajor, and that she had received a bone marrow transplant from a Cardassian woman named Kattell. (VOY: "State of Flux")

After the Borg transplanted skin onto Data's arm and the Borg Queen activated his emotion chip he felt pain when a Borg drone cut this flesh and blood ran out of it. (Star Trek: First Contact)

See also Edit

Background Information Edit

In Star Trek VI: The Undiscovered Country, Klingon blood was portrayed as pink and lavender, while in TNG and DS9 it was red. The supposed reason for this is that having floating red blood all over the ship was considered too violent, and would have given the movie a more extreme rating than would be appropriate for the target audience. Pink blood makes it obvious at a glance that the violence is simulated, not real. The change in blood may have been another side effect of the Klingon augment virus.

Apocrypha Edit

Several non-canon sources have suggested that the bases of blue-blooded aliens blood are silicon and cobalt. This would be logical as some real-life creatures have blue blood based on molecules other than iron and copper.

Brown blood -present in Cardassians- is only found in real life in the mollusc Pinna squamosa, which is similar to hemocyanin, but is based on manganese, instead of copper. Violet blood -present in Klingons- is found on certain molluscs, which is based on iron, but in a non-heme protein.

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