Cocaine.
Drugs can enter the blood stream by a number of ways: Swallowing Smoking Snorted Injected Suppositried (inserted through he anus, as a capsule,etc)
probabily not
if it is liquid then yes ( but dont try to)
No, vaccines are not injected into the skin. Most vaccines are administered through injection into the muscle or subcutaneous tissue (under the skin). Some vaccines are also given orally or nasally.
They are injected in the blood stream to deliver medications or fixing your ailments in the body.
Listeria bacteria can pass through the wall of the intestines, and from there they can get into the blood stream.
Dye is put into the brain using an Intravenous method. They dye is injected into the blood stream where it travels to the brain.
In air breathing animals, oxygen enters the blood stream through the alveoli, tiny sacs in the lungs. In water breathing animals oxygen enters the blood stream through the gills.
As the fangs of the serpent gets into the tissue of the human, an amount of poison is injected. Some gets into the blood stream by veins ruptured with the perforation of the fangs to the tissue. From there it travels to the rest of the body along with the blood. Some poisons also affect intramuscularily.
Oxygen enters the blood stream through the air sacs in you lungs.
Well, if it were possible, it would kill you. The only way this could possibly occur is if it were directly PUT (injected) into the blood stream. Inside of a man, excess sperm is easily absorbed into the system because it is basically a protein. When a woman is impregnated, the excess is simply absorbed by the system. In the blood stream, it would be seen by the system as a foreign matter and would probably cause instantaneous death, just as water, air, etc injected into the blood stream.
Either through the umbilical cord (in the case of a pregnant woman) or by passive smoking.Nicotine gets into the mothers blood stream which then flows into the baby's blood stream.