🌮🍲🍇🍒🥘🥙🍈 Do the test you how long its the nerves? Like by cm. No! The man are taller, longer, including the 4 limbs. That is not what I say the finger tip, you cannot see it yourself the entire body?! ... you hard memorize, or you looking at your diagram? 🌮🍲🍇🍒🥘🥙🍈

There are a lot of these diagram on-line, or in your textbook. I seeing them in the middle school, like the circulation system all looking red. That is the entire body are nothing but the blood everywhere.

In the vessel?

Correct.

Not open veseel?

Correct.

What if opens?

Stroke, if that location its in the brain or bruise on your knee, or hands, when you hit something or fallen on the ground.  

Can the vessel be broken?

Parasite. In the hospital, they have taken those surgical stuffs. A big fat white worm. The real clinical rotation stuffs.