This can be fatal. Cutting an atery will cause bleeding and it is dificult to stop it. This may lead to anemia also known as lack of blood.
the coronary artery
Basically means that the basilar artery (supplying blood to the brain) is widely open. So it could mean that its normal (arteries should be open!) or referring to the artery being dilated (an aneurysm). Though if this is something you've heard your doctor say referring to yourself I would recommend you just ask them what they meant :)
it would get dirty
I should think not. It usually takes something sharp to open a vein or an artery.
Worst case: you die from septicemia from an open fracture or from internal hemorrhage from the bone cutting an artery, else, the bone heals crooked and you walk funny.
To open an artery near the heart. :)
I have noticed no negative effects when I do.
open space aswhiteen the blood vessels.
they would bleed to death.
Why would you want to do that. You would have to cut open the heart and watch the blood move from the pulmonary artery through the heart and into the right radial artery.
The tubular space within an artery is referred to as the lumen. It is the inner open space where blood flows.
if the goldfish's mouth couldn't open then it wouldn't be able to eat and it would end up dying.