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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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2
votes
1answer
102 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 ...
6
votes
1answer
92 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, ...
4
votes
1answer
151 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 ...
6
votes
2answers
163 views

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 ...
8
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3answers
291 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 ...
0
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2answers
153 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 ...
5
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3answers
346 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 ...
11
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7answers
3k views

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 ...
21
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8answers
6k views

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 ...
5
votes
3answers
323 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 ...
4
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2answers
112 views

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....
1
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2answers
145 views

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?
5
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2answers
200 views

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 ...
6
votes
1answer
443 views

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 ...
3
votes
1answer
202 views

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 ...
0
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2answers
396 views

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 ...
10
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2answers
348 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 ...
11
votes
3answers
264 views

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 ...
28
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14answers
6k views

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 ...
2
votes
2answers
175 views

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 ...
2
votes
2answers
115 views

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 ...
13
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7answers
2k views

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.
26
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7answers
11k views

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 ...
11
votes
2answers
2k views

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 ...
6
votes
2answers
253 views

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 ...
6
votes
4answers
552 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 ...
10
votes
5answers
1k views

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 ...
2
votes
1answer
158 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 ...
26
votes
5answers
5k views

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 ...
0
votes
1answer
155 views

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 ...
2
votes
2answers
246 views

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 ...
9
votes
6answers
453 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 ...
11
votes
4answers
708 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 ...
3
votes
3answers
809 views

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 ...
12
votes
2answers
3k views

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 ...
1
vote
2answers
567 views

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 ...
0
votes
3answers
84 views

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 ...
3
votes
3answers
684 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 "...
15
votes
2answers
1k views

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 ...
2
votes
3answers
162 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 ...
28
votes
6answers
3k views

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 ...
12
votes
9answers
3k views

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 ...
3
votes
4answers
274 views

Is blood pressure a good restriction?

I'm researching who to let onto my generational ships. I have figured that certain pre-existig inheritable medical conditions should be screened out of who makes the cut or not, focusing on ...
-2
votes
2answers
148 views

Is it much easier to make entire human population to have blood type O than type AB? [closed]

Not all human blood are equal thanks to the antigens that prefer to strap themselves onto surfaces of cells. They are like a signal flare to inform soldiers whether target is friendly or not, most of ...
10
votes
2answers
631 views

Coboglobin clarification

I've been working on an alien species, and I wanted it to have a blood colour other than red. I was going to go with Coboglobin until I found the sites I was looking at providing diametrically ...
0
votes
2answers
191 views

Polycythemia good underground?

Polycythemia is where the hematocrit is above 55%. This can be divided into absolute and relative and absolute can be further divided into primary and secondary. Absolute polycythemia is where the ...
24
votes
16answers
15k views

Why can vampires only drink human blood? [closed]

Vampires are depicted differently in every work of fiction, but one thing mainly stays the same: they need blood to survive. Human blood, to be precise. Some stories add in the rule that they can also ...
4
votes
1answer
287 views

Most effective environment for coboglobin

So after reading over other blood colors and the benefits of other blood bases I wanted to create a species that used Coboglobin instead of Hemoglobin. Though based off of Jim2B presented of, On this ...
7
votes
2answers
508 views

Cyanoglobin plausible?

I have done research on blood and in particular the component adding color and transferring oxygen. Hemocyanin is directly dissolved into the blood. This works for an octopus, but not a reptilian ...
2
votes
3answers
383 views

Can slowing down someone's heart help them survive a stab wound? [closed]

Okay, in my story a character can use magic. Their friend has been stabbed in the chest. Could magically slowing down their heart or body help save them?