Questions tagged [blood]

For questions about blood, its use in the circulatory system, its effect and what would happen if it was changed.

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Effects of different coloured blood [duplicate]

Mammals gots red iron blood, crabby crustacean bois got the blue copper blood and those goddamned sea squirts got pink vanadium blood because metals and oxygen binding and stuff. But what if say a ...
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1answer
176 views

Bio “blood magic” how would it work in science fantasy [closed]

I'm putting together a story that centers around "blood magic" and ancient civilization that uses some "rare crystals" as infinite source of Energy. the blood magic comes in gas form [from any source ...
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Do dead human bodies have a particular smell?

I'm working on a story where there is a crime scene where the protagonist (who has a superhuman sense of smell) notices a scent that smells like human corpses due to their abilities. I'm wondering how ...
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1answer
71 views

Colors of cobaltodihistidine [closed]

I have heard the complex, Cobaltodihistidine, (not coboglobin) mentioned several times on this site in relation to alternative oxygen carriers, and I believe that this complex could be what my species ...
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How would blood types and blood transfusions work in a setting with widely different humanoid races? [closed]

This is something I think is almost always overlooked in science fiction settings. Do different races have completely different blood types from those of say humans? Could a Klingon from Star Trek ...
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1answer
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Why would spell circles written in blood which contain iron be more powerful than using gold or silver ink? [closed]

Set in the 13th century A. D. the search for Philosopher's stone which is said to allow user to transmute base metal into gold or perhaps even diamonds as some have claimed. Since then people starts ...
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2answers
175 views

Would cold-blooded dragon be suitable for flying?

I am designing a cold-blooded dragon about the size of a house cat with a wingspan of 3 metres from tip to tip. It will climb on top of rocks at noon when there is ample sunlight overhead. I need it ...
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Where could a vampire get blood without harming people?

I am looking for possible ways in which a vampire could obtain blood to feed in an modern urban fantasy setting explicitly without harming humans or other sapient beings. Parameters for this question ...
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1answer
124 views

How to prevent vampires from catching bloodborne diseases? [duplicate]

Vampires are known to be humanoid creatures to whom the nutrients in blood are essential. I will assume that, for the purpose of this question, vampires are entirely human but consume blood, may it ...
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1answer
130 views

Could a blood transfusion from immune survivors of a deadly, bioengineered virus grant the same immunity to those who don't have it?

First question so hope I'm doing this right! Working on a setting right now where a bio-engineered virus/plague is wiping out a large portion of humanity. Most died upon first exposure. Some survived, ...
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1answer
206 views

What kind of metal-based blood types be effective/used in transporting non-oxygen gases and what would their color be?

There's iridium-based blood called Chloro-carbonyl-bis(triphenylphosphine)-iridium that's effective at transporting hydrogen alongside oxygen. What I want to know is that, are there other metal-based ...
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Would it be possible for my fantasy creature to have black blood?

A friend of mine has a race of creatures in her headworld and has been wondering about a biological answer to justify the color of her race's blood even though magic is a bit sprinkled in there. One ...
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367 views

Blood for hydrogen breathers

Some follow-up thoughts on this question... Hydrogen isn't very soluble in water. Oxygen is more so, but still sufficiently insoluble that most oxygen-breathing Earth creatures use special oxygen ...
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176 views

Can ice magic freeze blood?

In my story, one of my main characters has ice powers. She can turn water into ice, she can conjure ice (sucking moisture out of air and freezing it). She can also drop someone's body temperature, as ...
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529 views

What would humans look like if their blood were silver?

I have a species in mind that I want to write about for a book I'm planning, and they look exactly like humans (minus the 'unnatural' hair and eye colors they can posses). However, they have silver ...
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Blood-based alcohol for vampires?

So a setting I had in mind has vampires, of the rather traditional kind. They aren't as inhumanly strong or fast, but in turn they aren't instantly incinerated by sunlight, instead just being really ...
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8answers
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What could a Medieval society do with excess animal blood?

In my fantasy project I have a vaguely medieval society (specifically the high period). However some of their religious practices are more along the lines of a iron age society. One of the biggest ...
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3answers
433 views

Is acid blood possible?

I'm designing an alien species, whose blood is highly acidic and can easily cause someone's hand to melt down. It's pretty similar to the Xenomorphs from Ridley Scott's Alien, except for the color ...
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If oxygen is extracted from blood, would the process cause any hormones within it to be extracted as well? [closed]

Let's say oxygen is continuously being extracted from the blood of a Giant Pacific, 1-and-a-third years old octopus and will be injected into a human using a process similar to this: https://www....
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2answers
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How could the hormones of an octopus affect an adult man? [closed]

Let's say the hormones of a Giant Pacific Octopus, 1-and-a-third years old, enter the bloodstream of an adult male. How would or could that affect him?
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What non-primate animals have similar blood to humans?

I am writing about a blood magic cult, and they drink/paint with collected blood to preform rituals and bursts of magic. Most of their supply is garnered through the use of human cattle, but in a ...
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1answer
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Is it possible to dye cloth/leather with blood?

Is it possible to dye leather/cloth with blood without it fading, perhaps by using a sealant of some-kind? Note: This would be in an apocalyptic world where advanced chemical compounds would have ...
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1answer
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What would be the implications of an ocean made from blood on the world? [closed]

In my world of Ulhe rather than having saltwater between continents the oceans are filled with the blood of a god. Besides being blue the blood has similar physical properties to human blood. It is ...
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How much raw pig's blood could a person swallow without getting sick? [closed]

I know there are some animals that you can safely drink from. Bear Grylls once drank the blood of an Elk, for example. In a story I'm writing, I'm including a birthday ritual where the sons and ...
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489 views

Bouncing Beads of Blood - Just how cold would it have to be?

My heroine has been stabbed - run through the abdomen by a foot-long dagger - and is bleeding to death. She is currently crawling toward her salvation through a very cold place. She is magically ...
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Could an organism have several oxygen transport proteins?

Can an organism have several types of oxygen carriers in its blood? Note that I am not asking how the creature could have evolved, that is too much sci-fy, genetically engineering or Deus Ex Machina ...
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Why would a blood transfusion of midiclorians not make my force abilities stronger?

Midichlorian's are chemical compounds found within every living cell that forms the basis between the connection life and the Force. Without midichlorians, life would be impossible. The amount of ...
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How long a human being could live with stem cells?

I once saw an experiment with mice, where they connected the bloodstream of a younger mouse to the bloodstream of an older mouse. And the older mouse became "younger", or at least healthier. If I ...
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Could DNA Survive in Outer Space?

In my story the inhabitants of Earth are near extinction. They want to make a capsule of a bunch of human DNA and blast it toward the Andromeda galaxy. They take 1 oz of every blood type still living ...
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7answers
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Would it be possible for mammals to evolve blue blood?

Ever since I found out about the green blooded skink, I have wondered if it's possible for other blood colours to evolve among vertebrates, specifically blue in mammals.
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How can a person be kept alive while being periodically drained of blood?

I have invented a large machine that allows me to create monsters out of blood. These monsters are called golems and are very powerful. My plan is to produce a large number of them to include in my ...
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Human Blood Reactivity on an Alien Species' Skin

What would be a valid reason for human blood/sweat/body fluids being toxic/harmful/caustic to an alien species' skin? What would the aliens' organic biochemistry be like and what would their DNA be ...
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Which hydrogen halide to have in blood to replace water?

So I want to have an alien creature on a planet with a halogen atmosphere. It will have to be at a temperature where the hydrogen halide is liquid or solid. This hydrogen halide I would have as the ...
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4answers
682 views

Can telekinesis be used to stop someone from bleeding to death?

So let's say someone has telekinetic powers. He can move a bunch of things at once with his mind as long as the objects aren't too heavy. One day he's walking through a dark secluded alleyway and, oh ...
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Alternative elements for oxygen transport in an alien blood

I am designing an alien civilization for a story, and I am currently in the biological part. They will be oxygen breathers, so they will need to have that oxygen delivered inside their bodies, and I ...
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1answer
196 views

What cost to creating vampires [closed]

Assume a world in which vampirism is totally unlike how it is usually portrayed in Bram Stoker's Dracula, Anne Rice novels, True Blood etc. Instead it's somewhat analogous to a disease where the ...
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How reflective is blood?

If you were on a raft in say, an ocean of blood, and it was very still, would you be able to see the stars of the night sky reflected in it? Would you be able to see your own reflection? How far down ...
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1answer
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What would the pros and cons of self propelled blood be (by any process) [closed]

Self propelled blood has been used many time in fiction to explain why rival characters cannot be killed. An example would be a manga named The Throne of Super Man (Choujin Sensen). In the manga ...
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Blood magic in a science fantasy? [closed]

I'm putting together a story that centers around a unified galactic government, but I hit a small snag. Blood magic would be the only "supernatural" aspect of the story, and it would be illegal to ...
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479 views

Radiation shielding in the blood?

I wanted a creature that produces something in its blood to protect itself from SEP (solar energetic particles) and GCR (galactic cosmic rays). The skin of the creature is normally sufficient ...
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4answers
759 views

Could a decreased heartrate thanks to better hemoglobin lead to an increased lifespan?

When looking at mammals and their heart rates one can find a correlation between the lifespan of a mammal and their heart rate. Namely most mammals seem to get about 1 billion (the American one) of ...
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Blood Transfusion in the Middle Ages

It is the typical Middle Ages. Simple bow and sword wielding peasants. They have basic medical skills, can stitch wounds, amputate, etc. In this age, will it be possible to do a blood transfusion? If ...
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How would black blood change a human's appearance?

Say they had pale skin, what would they look like? Would the lips be black? Would the vascular system show through the skin more? I'm not very interested in how or why their blood is black, just how ...
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What would women do about periods in a medieval fantasy setting? [closed]

CN: blood. (I also don't want to upset people with gruesome descriptions - answers that stick to the clinical side of things would be appreciated.) In a medieval fantasy setting, what would women do ...
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3answers
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Is it possible to extract all nutrients from human via blood? [closed]

You want to extract all nutrients from other human. You build some sort of machinery that processes blood, taking most of nutritions - fats, proteins, carbohydrates etc. and some blood, so nutrients ...
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3answers
877 views

How do I make a new and interesting type of “Zombie” creature?

CODE DRIVER In my story, I want to have a world in the middle of a zombie apocalypse, but I also want it to feel different from any other interpretation out there. I call my monsters "Odd People" or "...
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How far can blood spray?

A creature has evolved to protect the herd. Its blood contains chemicals that act like pepper spray, burning the eyes and throat of anything around it. However it wants to be able to get a decent ...
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3answers
175 views

Increased blood pressure reasonable?

My Kepler Bb humanoids have their arteries and veins doubled up(quadrupled if you are looking at the coronary arteries and veins). This makes sense because they have 2 hearts and both of those are 4 ...
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6answers
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How well could a dog pick out the scent of a single person in a pool of carnage?

I'm writing about a world that predates most modern forensic techniques, and I am looking for some old-fashioned methods of sleuthing that would have been available at around the 1850-1900. In one ...
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9answers
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Robots with (specifically red) blood

So I want robot enemies in my series, but I also want gore without killing living creatures (related to this, because the opponent is the same, the gr8 computer) So basically the robots I talking ...