Vein - Anatomy

Anatomy

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. Deeper are bands of smooth muscle called tunica media, which are, in general, thin, as veins do not function primarily in a contractile manner. The interior is lined with endothelial cells called tunica intima. The precise location of veins is much more variable 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.

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Other articles related to "anatomy":

Guy De Chauliac - Works - Chirurgia Magna - Emphasis On Anatomy
... that surgeons should have a thorough understanding of anatomy ... He wrote, "A surgeon who does not know his anatomy is like a blind man carving a log" ...
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Somatosensory System - Anatomy - Brain
... A relationship between the somatosensory cortical areas and their projection of the body was discovered by recording electrical activity in the human cortex after mechanosensory stimulation of different body parts during neurosurgical procedures ... These data led to the construction of somatotopic maps in which a Somatotopic arrangement was generated ...
Prosector
... working for lecturers and demonstrators in anatomy and pathology ... is a professionally prepared dissection prepared by a prosector – a person who is well versed in anatomy and who therefore prepares a specimen so that others may study ...

Famous quotes containing the word anatomy:

    I love to see, when leaves depart,
    The clear anatomy arrive,
    Roy Campbell (1902–1957)

    But a man must keep an eye on his servants, if he would not have them rule him. Man is a shrewd inventor, and is ever taking the hint of a new machine from his own structure, adapting some secret of his own anatomy in iron, wood, and leather, to some required function in the work of the world. But it is found that the machine unmans the user. What he gains in making cloth, he loses in general power.
    Ralph Waldo Emerson (1803–1882)

    Man is a shrewd inventor, and is ever taking the hint of a new machine from his own structure, adapting some secret of his own anatomy in iron, wood, and leather, to some required function in the work of the world.
    Ralph Waldo Emerson (1803–1882)