If you drink snake venom or it happens to get in your mouth by accident while extracting it from the snake,?
For the best answers, search on this site https://shorturl.im/MgLuH Not a Christian but there's actually a difference between venom and poison. If you didn't have any sores or cuts in your mouth, you could successfully drink snake venom without having any serious negative effects because it wouldn't be able to get into the blood stream. You've used misleading terms-- sneaky!
Is it ok to drink your own blood?
I suppose you could die from iron poisoning if you drank enough of it. Generally- the fluids that come from your body are not toxic to it. (sweat, urine and tears, however are your bodies way of getting rid of waste and are mildly concentrated toxins that probably won't help matters.) I wouldn't advise "drinking your own blood" because your saliva breaks down enzymes preventing repair. When you get a cut your body goes into "must stop the leak" mode. Platelets (parts of your blood) beginning to stick together, blocking the flow and causing chains that eventually become scabs so your body can heal itself. If you don't allow that scab to form, you will take longer to heal. You may also make your friends sick and be accused of being a closet vampire.
If you inject pure water into someone's vein what will happen?
The main problem with injecting pure water is haemolysis. As someone has stated, the difference in the concentration of salts inside the cells and the plasma outside (which has been diluted by the injection) will cause the red cells to swell with water and burst. Probably isn't a major issue if only a small amount is injected, but can release large quantities of potassium into the blood stream which isn't always a good idea (have no idea how much would be needed for it to be a problem, I'm sure someone has worked it out) For this reason, injected fluids are normally salt or sugar solutions which are comparable with plasma in terms of osmolality. "Normal saline" is a 0.9% sodium chloride solution which is close enough in terms of osmalality to work.
What happens if air is injected into the body?
For the best answers, search on this site https://shorturl.im/avEBQ An air embolism, or more generally gas embolism, is a medical condition caused by gas bubbles in the bloodstream (embolism in a medical context refers to any large moving mass or defect in the blood stream). Small amounts of air often get into the blood circulation accidentally during surgery and other medical procedures (for example a bubble entering an intravenous fluid line), but most of these air emboli enter the veins and are stopped at the lungs, and thus a venous air embolism that shows any symptoms, is very rare. For very large venous air embolisms, death may occur if a large bubble of gas (10's of milliliters) becomes lodged in the heart, stopping blood from flowing from the right ventricle to the lungs (this is similar to vapor lock in engine fuel systems). However, experiments in animals show that the amount of gas necessary for this to happen is quite variable, and also depends on a number of other factors, such as body position. Very large and symptomatic amounts of venous air emboli may also occur in rapid decompression in severe diving or decompression accidents, where they may interfere with circulation in the lungs and result in a choking sensation or hypoxia. Gas embolism into an artery, termed arterial gas embolism, or AGE, is a more serious matter than in a vein, since a gas bubble in an artery may directly cause stoppage of blood flow to an area fed by the artery. The symptoms of AGE depend on the area of blood flow, and may be those of stroke or heart attack if the brain or heart, respectively, are affected. The amount of arterial gas embolism which will causes symptoms depends on location, but in the brain may be a bubble with a volume only a fraction of a milliliter.