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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Is it safe to cook and drink human blood? [duplicate]
post titles that'll get me put on a watchlist
A culture I've been working on has...interesting views on medicine. They divide the physical body into 6 parts, one of them being blood. Long story short, ...
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Is it possible for an intelligent species to have non-red blood? [duplicate]
Humans have red blood. This is caused by the protein Haemoglobin. Most vertebrates have this type of blood because it is the most effective at transporting oxygen. Haemoglobin contains iron, which ...
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How would my fantasy race keep blood in ceremonial pots without it getting gross?
There’s a group I’m designing that believe blood to be sacred, and at 7 they begin keeping it for rituals and such.
The amount of blood is about a drop per day and is kept in a (glazed) clay pot that ...
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Anatomically Correct Chupacabra [closed]
This is a submission for the Anatomically Correct Series.
The Chupacabra is a legendary cryptid animal from North American folklore. It is a strange bear-like or reptilian creature that sucks the ...
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What would someone look like with golden blood?
Not actual gold, only golden in color. This is entirely for appearance wise only, how would gold-coloured blood look on someone who is very, VERY pale. Not only skin tone, but how would it affect ...
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Would copper-based blood be more effective at carrying oxygen rather than iron-based? Or would it hinder the delivery of oxygen?
Would copper-based blood be viable for a human-like land-based species in an earth-like atmosphere or would it be worse than iron-based blood?
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How does having blue blood affect the color perception of a species (on a subconscious level)? [closed]
In color psychology, red provokes the strongest emotion of any color. The increased heart rate can be associated with either blushing and passion or power and danger. So in general, you could say that ...
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Is there an Evolutionary advantage for 10% of my mammalian species from the Homo genus to have Von Willebrand blood-clotting disease?
In my world, there is a species of human called Homo hematophagus (blood eating human).
Traditionally, these vampires are a cannibalistic race: In war they often drank the blood from their rivals' ...
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Methods to transport CO2 through HCl-rich blood to the lungs?
Situation:
The extraterrestrial vertebrate lifeforms have milky white blood rich in aqueous HCl, using an enzyme centered on aluminum oxychloride nanoparticles to transport oxygen, releasing chlorine ...
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What are the possible attributes of aluminum-based blood?
Situation:
The vertebrate life of a distant planet uses biogenic silica for structural support. However, biogenic silica is soluble in water, but (according to this article) its solubility decreases ...
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How many liters of blood would a small dragon have?
Heyo! I was wondering, how many liters (measurement) of blood would a small sized western dragon have? (Only slightly bigger than a large tiger at teen age)
In addition to that, compared to human ...
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A creature has one heart per bodily extremity. How large does each have to be?
The creature has several hearts, each supplying blood to one limb. For all other intents and purposes the creature is human. Of the six smaller hearts, one supplies each arm and leg, one supplies the ...
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My creature mixes lye and sal ammoniac to cool its blood. How cold can its blood get before it stops working as blood?
Background information:
According to various sources, the human heart pumps 5 liters of blood/minute at rest and 15-20 liters of blood/minute during running or exercise, 6,000 to 7,500 liters of ...
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Could interspecies blood transfusion from organisms of various sizes occur?
In my universe, there are sixteen species from the Homo genus: anatomically modern humans, demons, angels, merfolk, ogres, giants, halflings, dwarves, elves, goblins, gnomes, orcs, trolls, vampires, ...
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What would it be like to have your hand chopped off by an axe? [closed]
A child character in my book was caught stealing food for their parents and the people who caught them chop off their right hand with an axe as a lesson to "keep their dirty hands off".
I've ...
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Would a vampire be able to use a blood substitute as a food source, such as coconut water? [duplicate]
I have a character in my story who is both a vampire and a practicing Muslim. I have another who is also a vampire and she subsists off menstrual blood. [Nutritious :>] However, I imagine Sam (the ...
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Is it possible for a blood type AB person to become type O temporarily?
I need a temporary mechanism for blood type switches for my modern love story, the protagonist is a werewolf and would transform every time when there is a full moon. I was thinking maybe a certain ...
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Why would a species from the Homo genus have overwhelmingly B negative blood type?
In my story (go to see What evolutionary pressures would lead to Ogres?), there is a massive species from the Homo genus called ogre. They mostly have B negative blood type (I do not mean Rhesus null, ...
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Using nanoparticles to give people blood clots for fun and profit
Some background: this question concerns iron oxide nanoparticles. Iron oxide nanoparticles are approximately 1 to 100 nanometers in diameter, as opposed to, say, a red blood cell, which is 10,000 ...
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How do I stop blood from clotting except upon exposure to the atmosphere? [closed]
Blood clots in order to stop bleeding.
The problem is that sometimes it clots when it's not supposed to. This is called thrombosis. It kills a lots of people each year.
I want this to stop happening. ...
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Despite having serrated fangs, why doesn't the vampire make a mess during a feast?
The vampire loves fresh blood and often sneaks into houses at night to feast. It would wait for nightfall when the occupants were asleep and then force their fangs into the neck of it's victims. ...
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What is the largest size a creature using hemocyanin instead of hemoglobin could reach?
I haven't been able to find much on this question. I am making a world that is fairly cold compared to ours, not quite a snowball planet but enough that the highest average temperature is 66 degrees ...
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How can a vampire produce T cells at home?
Let's say that there's a vampire that consumes human blood for a regular re-infusion of T cells - both a convenient way to explain why they don't need massive amounts of it (you only need a few, and ...
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What would the effects of a muscle-wrapped mesh of a circulatory system be on a human?
Let's say that there is a biomodified human. Their circulatory system is something of a mesh; there are artificial connections between their blood vessels wherever physically possible, generally at ...
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How could a vampire acquire specifically human blood without killing anyone?
I've seen a similar question posted here, but my vampires require specifically human blood. Anything other than human blood or water is disgusting and indigestible to them. Some more notes:
Drinking ...
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Could a chemical be used to carry oxygen in blood that would also turn acidic when in contact with iron?
So, the general idea is this:
A humanoid species' blood uses a chemical to carry oxygen throughout their system. When iron is introduced into their bloodstream by say, stabbing them, it results in the ...
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Would it be biologically advantageous for a vampire that doesn't need that much blood to lick away skin in order to extract it, rather than bite?
Let's say that there's a vampire that doesn't need much blood per day - something like a teaspoon. Instead of deriving nutrition from it, they need it for its antibodies, so that their nonfunctional ...
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A reality check on blood viscosity decreasing under high temperature
Is blood that decreases in viscosity as it increases in temperature plausible? It's supposed to be a biomodification that decreases the amount of energy the heart needs to put in during strenuous ...
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Moving air with a heart?
Could an animal, instead of lungs, have an extra circulatory system that pumps air instead of blood? It seems plausible that it would work with water, as water seems similar enough to blood, but air, ...
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Why would vampires require human blood?
In my world, vampires need to consume a small quantity of human blood every month to survive. They usually supplement their diet with animal blood and human food.
A vampire which goes without human ...
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What would happen if a refrigerated bag of human blood was warmed up in a normal kitchen microwave?
I have a vampiric character who feeds on human blood. She can do your normal plastic hospital blood bags or from the vein, but obviously blood needs to be refrigerated in order to stay fresh and cold ...
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What color would humans be if our blood wasn't red?
Humans, currently, are varying shades of orange and brown. Sometimes paler humans are more of a reddish color. But what color would a human be if our blood was blue, green, or any other non-red color? ...
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What are some ways I can ensure that only a small amount of people actively try to pursue divination in a pre-modern society?
I'm trying to make a story where the amount of people that are able to see the future range from 1-0.1% (i.e. 1 in 100 to 1 in 1000). The problem I'm having is that I'm trying to have my cake and eat ...
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Is bi-metallic blood possible to develop organically in a species?
I've looked up the different "Colorations" of blood online, different metal-based proteins have differing levels of oxygen transfer efficiency, but those were answers I didn't find ...
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Biological Antifreeze In Blood
Okay, so I have a sapient alien species that has a carbon-based biochemistry, and is extremophilic, able to survive having their internal temperature lowered to as cold as 253 K. They are able to do ...
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How long would it take for inbreeding issues to arise for a family that practiced inbreeding?
The magic in my setting arises from inbreeding. However to gain the powers a person must be in-bred. How long would it take before such problems arise from inbreeding if the people continued this ...
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How do you transfer a blood curse? [closed]
The curse is made into a tea using the ashes of war, the blood of fallen soldiers, and the tears of their widows and then given to the victim to drink. Since the curse is in the victim's body and made ...
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How can a 15-year-old vampire get human blood?
Since they can't really work a job that would allow easy access to blood, I thought of having them volunteer at a blood bank then maybe steal a bag. Alternatively, is it plausible that they would come ...
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How would certain blood types be more susceptible to "blood bending" than others?
There exist abilities that are specifically tuned to certain individuals or clans. One of these strange abilities is known as blood-bending, which is the power to turn an individual's blood against ...
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Infectious hemophilia
I want to know if the disease I invented is realistic or a total fiction.
Coagulopathies or bleeding disorders, like hemophilia, and Von Willebrand's syndrome, are diseases in which the blood's ...
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Would a vampire still be able to be a practicing Muslim?
I had debated whether asking this but given the very good answers on this question I thought it would be worth a shot. I have a character in my story who is a vampire and a practicing Muslim. ...
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If a scientist were to compare the blood of a human and a vampire, what would be the difference (if any)?
I tried to stick with vampire folklore and the various movies/shows about vampires when I thought of how vampires would be like if they really existed, but I also wanted to keep it as realistic as ...
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What would bloodstains look like after 500 years?
I realise this is a bit of a strange question, but what would bloodstains look like after ~500 years? Specifically, what would a text written on parchment using (human) blood as ink look like after ...
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What would 500 year old dried blood look like?
Imagine you are in a mountain cave (in the mountain, or under the earth), and you stumble upon a what seems to be a lake of blood. It's roughly 4mx4m (13ft) wide and 2m (6.5ft) deep. The blood is ...
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Can blood form snowflakes?
In a (marginally) cursed world rains of blood are an occasional occurrence. The water in the clouds is magically transmuted into blood at the point it starts to coalesce into droplets (no need to ...
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What blood pigment type is immune to ammonia poisoning?
I am designing a world in which the biological solvent is an ammonia-water mixture and need help finding out which blood pigments (Hemoglobin, Hemocyanin etc.) would be immune to the negative effects ...
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What colour would our blood be if our blood was based on gold? [closed]
Humans have blood based on iron, thus our blood is red.
Some aquatic life has copper based blood, thus their blood is blue.
If we were gold based, what colour would our blood be, and why?
What would ...
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How do male vampire loses iron?
In my universe the vampire race all had pale skin due to low iron presence in blood and thus they had to constantly keep a certain level by feeding on human, the female vampire can lose a lot of iron ...
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Could a blade rusted by dried blood become jammed in its sheath?
My character forgot to clean his sword after killing a man. The blade stayed for weeks in her sheath, drying the blood.
I wrote a scene where he can't unsheathe his sword because it's "jammed&...
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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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