If I remember correctly from the book, she can eat human food, but she doesn't like it much and prefers blood. So I suppose that she doesn't really need it in the terms that she can survive without it, but she strongly prefers it to the human food.
The human body does not need sugar to survive.
They need blood to survive
Because
It needs the human bodies temperature to survive.
human beings need nitrogen for building proteins and o2
Human beings derive nutrition from the food they eat. The food eaten is converted into simple organic substances by process of digestion. They are then absorbed into the blood stream where the are then transported by blood to various cells of the body.
Cobiasco Vampires are vampires that do not feed on human blood or any other blood that normal vampires feed on. Instead, they need to feed on the blood of a werewolf in order to survive (talk about being your finicky eater) == == == == ----
Lice only drink blood, it is the only way they can survive. They need to feed every two to three days in order to stay alive. They only drink human blood being that they are a human parasite not an animal parasite. This means they do not drink animal blood.
Yes. All animal's brains need blood to function
All of them.
A gallon