If you spit up blood you need medical treatment as soon as possible.
Yes, go to the doctor and he will tell you what to do next. Spitting blood is a problem.
Go to the hospital as quickly as possible!
Of course not!
yes
yes
Because of the increase blood volume circulating in the body, there is more blood going to the tongue and salivary glands then there will be increased in saliva production.
because blood/spit contains cells
Spit up in infants is normal, but parents should seek medical advice if the baby is consistently spitting up large amounts, is not gaining weight, is irritable or in pain, has blood in the spit up, or has difficulty breathing.
They spit blood out there eyes by putting their eyes behind their head and use heat to draw blood out their eyes.
no
serious issue my friend
There are no Iguanas that 'spit blood'. I think you're referring to the horned lizard - which, as a defence mechanism, has the ability to rupture the blood vessels at the corner of its eyes - shooting a stream of blood at an attacker.