Capsaicin is the active chemical in red peppers, used as "pepper spray" and heating rub. It is a nerve irritant and could cause damage to the blood vessel walls and any muscles it passed through. The effect on the heart and lungs would depend on the amount (concentration) but it would definitely be unpleasant for the injectee.
Vaxigrip is generally injected Intra muscularly. But if injected to vein, then the Influenja Virus would travel via vein to your heart, and damage your heart.
what would happen if we remove the vein from the leaf
No, it is injected into a vein, not the testicles.
If injected directly into a vein in pure form, absolutely.
Medication is injected into either a vein or a muscle, depending on what it is and how fast it is to work. Into a vein (intravenous) is immediate as it goes directly into the bloodstream. Intra-muscular takes around 20 minutes.
It'll burn like hell.
About 1 Mg.
Renal venography, where a contrast material (dye) is injected into the renal vein before x rays are taken, is one of the best ways to detect renal vein thrombosis.
If you pop a vein in your bladder, there will be much bleeding.
injecting a strong and irritating solution (a sclerosant) into the veins and/or the area beside the distended vein. Sclerosant injected directly into the vein causes blood clots to form
There are a few different kinds. Sclerotherapy has liquid injected right into the vein to reduce the appearance. Laser treatments are used as well. Radio waves can be used and surgery is an option.
intravenous is what it's called because it's injected into the blood directly by the means of the vein.