Question

Sometimes doctor inject medicines directly into our bloodstream. Where do they inject it, in the artery or in the vein? Explain why.

Answer 1

Answer:

Sometimes doctor injects medicines directly into our blood stream. They inject into vein.

Explanationation

as the blood pressure in vein is lower than the artery

and artery lie deep beneath the vein

Answer 2

Answer:

doctor inject medicienes in our vein because vein transfer blood to whole body