1、Veins Convey blood back to the atriums from the capillaries Larger cavity, thinner wall, lower pressure, slower flow Consist of two sets of vessels, the pulmonary 肺部veins and systemic 全身veins Systemic veins Superficial表皮 veins and deep深层veins Superficial veins Lies in the subcutaneous皮下 fascia, not
2、paired with artery Cooling降温 of the body Used for transfuse输血, catheterize and phlebotomize Deep veins Accompany the arteries with the same name and same supplying area Usually two or three in number Carry the vast majority of the blood Venous valve静脉瓣 Paired, semilunar半月形, open towards the heart Nu
3、merous多 in the limbs四肢, especially in the lower limbs A few or absent in head, neck, thorax, abdomen肚子 and pelvis骨盆Varicosity静脉曲张 The Systemic VeinsDivided into three groups Superior vena cava and its tirbutaries支流. Inferior vena cava and its tributaries including hepatic肝门静脉 portal vein and its tri
4、butaries . Veins of the heart.Superior vena cava Drains 排走the blood from the head, neck, upper limb, thorax and part of the abdominal wall Formed by right and left brachiocephalic头臂 veins Receives the azygos单奇 veinSuperior vena cavaBrachiocephalic veinAzygos veinBrachiocephalic vein Formed by intern
5、al固有 jugular vein and subclavian vein behind the sternoclavicular joint胸锁骨关节 The angle of the union联合 is termed the venous angle静脉角Internal jugular veinSubclavian veinVenous angleInternal jugular vein Begins at the jugular foramen颈静脉孔 Intra-cranial tributaries 内颅侧支流Collects blood from the meninges,
6、skull, brain Extra-cranial tributaries Collects blood from superficial parts of face and much of the neck Keeps openSigmoid sinusInternal jugular veinBrachiocephalic veinJugular foramenFacial脸 vein Begins at the medial angle of the eye Receives the anterior division of the retromandibular下颌后静脉 vein Drains into the internal jugular vein Collects the blood from the anterior part of faceAngular具梭 veindeep facial veinpterygoid venous plexusFacia 脸l veininternal jugular vein cavernous sinussuperior and inferior ophthalmic眼 vein
