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technology has helped control the blood flow by putting in a fake heart or a microchip in your heart which does the same job as the heart but has to be replaced
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i do not beleive that humans have the technology to have made a calculator that measures strate from the stream of blood the doctors have to extract blood in order to find a blood pressure
Yes, but it's very hard for her.
IAIB (4)
Because he's what they call a vegetarian vampire. he's learned to control himself around humans although he thirsts for there blood desperately.
They called it 'blood control' but didn't go into detail about the control mechanism. It affected only people with a certain blood type, and as the Doctor explained, the control was not strong enough to actually force a person to kill themselves, the Sycorax hoped the threat alone would suffice.
Blood type in humans is an example of multiple alleles.
Blood type does not determine whether marriage is allowed or not.
Vampires do not change into bats. That's not true. They don't kill humans either because they're not allowed to or the council would find them and kill them in the most painful way for almost exposing their kind. They get blood from willing donors of people they trust.Also from expires blood from hospitals.