The tear in the vein let gas enter the bloodstream, resulting in an embolism that led to cardiac arrest.

Researchers found up to 700 types of bacteria can enter the bloodstream through damaged gums.

The fungus flourishes on skin and can enter the bloodstream via wounds, where it can cause abscesses and sepsis.

At this level particles can travel through the lungs to enter the bloodstream.

Once in the lungs, the particles pass through the fine lining and enter the bloodstream, which transports them around the body.

Even if chlorophyll did function like haemoglobin, which it doesn't, it wouldn't reach the bloodstream because it's broken down in the gut.

Lead was able to reach their bloodstream through the air, soil and households in and around their living environments.

Once in the body, only 0.05% of the californium will reach the bloodstream.

They are testing a synthetic molecule that destroys tobacco's 'feelgood' effect by stimulating white blood cells to smother nicotine when it reaches the bloodstream.

If the parasite reaches the bloodstream it can spread through the body, most frequently ending up in the liver where it causes amoebic liver abscesses.