All of them.
4
They need blood to survive
no but there r vampire bats and there r people who need blood more than others to survive because of blood problems!
no they do not need sunlight to survive
Yes. All animal's brains need blood to function
80%
how many people are need to gave two units of blood?
yes the brain can think with the blood flowing smoothly
Some animals need to drink blood to survive.
The same things we need to survive here on earth.
I am, and yes but I don't need much and it's not like I need it to survive. There are other vampires in the world who do and others who just take energy from people on the street.
The average adult human has about 10 pints of blood in their body, but you can survive with as little as 6 pints. The exact amount needed varies depending on factors like size, health, and medical condition.