system
Given the following post, respond as if you're commenting on Reddit:
human
Why do dart guns require less precision than a medical syringe?

Whenever I go to the doctor for blood samples or vaccines, they always insert the syringe in an arterie. But I never see hunters aiming for arteries on animals, yet the tranquilizing effect stil happens. The doctor also needs to feel my arm to find the arteries, something I imagine would be impossible for hunters.

I know the blood circulatory system is the body's way of transporting hormones and important nutrients around the body. Do tranquilizing darts:

1. Affect the nervous system? The body's other method of transporting, used for electrical signals.
2. Have so strong dose that they affect blood stream even when fired into tissue?
3. Actually hit arteries? Who knows, maybe I'm underestimating the skills of hunters?
gpt
First off, the doctors are looking for veins not your arteries. 
Secondly, besides movie magic, the anesthetics on the darts take a while to set in as they are typically intramuscular shots.
Third, when you are put under anesthetics for surgery it is all done intravenously to allow for better flow and control of the medications that render you into the desired state of consciousness.
Fourth, you could be knocked out with an intramuscular injection too, its just less controlled and leaves a bigger headache afterwards.