jugular Vienna (YaV) removes blood from the organs and tissues of the head in the cranial vena cava.It happens inside and outside.
1. The first of these is close enough to the surface of the body, so it can be seen with the appropriate muscle tension.It is located in the jugular gutter and carries blood from the nape of the neck, the skin of the neck and chin, and then flows into the inner YaV.It has a valve in it flow into other veins, such as:
a) anterior jugular Vienna - originates in the chin is directed down to the surface sternohyoid muscle.These two, on both sides, they descend into the suprasternal space, which are connected by anastomosis (jugular arc).Thus, the front jugular veins merge to form a neck vein.
b) back ear Vienna - conducts the blood coming from the plexus, which is located behind the ear.It is located behind the ear.
c) occipital - carries blood from the venous plexus in the back of the head, it is poured into the outer YaV, and sometimes into the interior.
g) suprascapular - it goes along with the artery and has a view of the two trunks connecting one end section of the subclavian vein.
jugular Vienna (outdoor) contains valves.
2. A special role is played by the internal jugular Vienna.It takes its origin in the place of the jugular foramen, which is located at the base of the skull, it passes obliquely across the neck down under the sternoclavicular muscle, resulting in its lateral sections at the base of the neck.
In the case of turning the head to the other side, it goes through the joint between the ear and the sternoclavicular sochlenenieya, located in the carotid arteries and the carotid bag lateral nerve.
should also be noted that in the brain, namely its hard shell, are a system of veins flowing into the veins and diverting blood from the said body.All of them are connected to one another and form a hard shell venous sinuses of the brain.So, the blood is concentrated in the two sigmoid sinus passing through certain holes in the skull.In this way the formation of the right and left internal jugular vein.
few more are included in inflows, which remove blood from the pharynx and larynx, salivary glands, oral and nasal cavity and skin of the head and neck and thyroid gland.In the inner YaV flow and other veins, such as:
a) front - originates from the lower jaw at the confluence of two veins (the front of the front and back) is sent down, then back.It has no valves.
b) thyroid vein - accompany the artery and vein flow into the front or lingual.They have valves.
c) pharyngeal - originate from the surface of the throat, they infused vein vidian channel palate, eustachian tube.Their number can vary, they do not have valves.
g) lingual Vienna - located near the artery, leaving her, she lies down on the surface of the lingual muscles and runs parallel to the hypoglossal nerve.It has valves.
should be noted that all the veins of the head are anastomoses with venous sinuses through the bones of the skull.Thus, they are located at the inner corner of the eye, behind the ear, in the region of the crown.These anastomoses allowed to adjust the pressure in the skull.Also, in the case of inflammation in the tissues, they are by switching on the lining of the brain inflammation, which is quite dangerous phenomenon.
Thus, the internal jugular Vienna, connecting with subclavian, forms the trunk superior vena cava.
jugular Vienna, being located in the neck, produces blood flow from the tissues and organs of the head, and is part of the superior vena cava.It is a two pair (external and internal) that perform important functions in the regulation of blood flow, as an integral part of the human circulatory system.
