In the circulatory system, veins (from the Latin vena) are blood vessels that carry blood toward the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart. In contrast to veins, arteries carry blood away from the heart. Veins are less muscular than arteries and are often closer to the skin. There are valves in most veins to prevent backflow.
In general, veins function to return deoxygenated blood to the heart, and are essentially tubes that collapse when their lumens are not filled with blood. The thick outermost layer of a vein is made of connective tissue, called tunica adventitia or tunica externa. There is a middle layer bands of smooth muscle called tunica media, which are, in general, much thinner than those of arteries, as veins do not function primarily in a contractile manner and are not subject to the high pressures of systole, as arteries are. The interior is lined with endothelial cells called tunica intima. The precise location of veins varies much more from person to person than that of arteries. Veins often display a lot of anatomical variation compared with arteries within a species and between species.
I know you know
Let the life come back and force through my veins
It goes, it goes
Through the protons, neutrons securing the frame
Say yes say no
It's a matter of me forcing the praise
Put on the new
Woman, man, and child who are breaking the braces
The catacombs
And revolving doors inside of my brain
Preachers and whores
And the neon pulpits burst into flames
I come from both
Sides of me and either side of their tracks
Humbling my ghosts
Letting life that floods my veins bring me back
The unshackling of the chains on my wrists
And the loyalty to pain that resists
And the greatest books are talking about this
Why must everybody die to exist?
Hello my love
Seeking passages and food for your soul
On 95
Look ahead cause they're not filling that hole yet
Come lay your hands
Over mine and it will make us both brave
Braver to know
Let the light, the life force back in our veins
The unshackling of the chains on my wrists
And the loyalty to pain that resists
And the greatest books are talking about this
Why must everybody die to exist?
Are you ready for the power of god?
Are you waiting for the saints to all nod?
At the girl who should be raised from the dead?
At the demons who've been forced from my head?
Oh hallelujah
Oh hallelujah
Oh hallelujah I've come undone
Oh hallelujah
Oh hallelujah
Oh hallelujah I've come undone
The unshackling of the chains on my wrists
The loyalty to pain that resists
And the greatest books are talking about this
Why must everybody die to exist?
Are you ready for the power of god?
Are you waiting for the saints to all nod?