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THE VEINS OF THE BODY

THE VEINS OF THE BODY. Dr. Nabil Khouri. Systemic Circulation:.

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THE VEINS OF THE BODY

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  1. THE VEINS OF THE BODY Dr. NabilKhouri

  2. Systemic Circulation: 1. superior vena cava drains a. azygos system b. right and left brachiocephalic veins c. internal jugular and subclavian vein d. external jugular and axillary e. cephalic vein (superficial) and brachial vein (deep) which drains radial, ulnar, median cubital and basilic veins

  3. Cranial Circulation: cranial venous sinuses

  4. Dural sinuses • Drain the veins of the brain • Cavernous sinuses • Dangerous if trauma • Come together as sigmoid sinus – becomes Internal Jugularvein • Exits skull through jugular foramen

  5. Internal jugular veins • Drain most of blood from brain • Run lateral to internal then common carotid • At base of neck joins subclavian v. to form brachiocephalic v. • External jugulars – drain some of scalp & face

  6. Azygos system drains the thorax : Note that unlike the arteries, the veins have a brachiocephalic on the right and left sides

  7. Deep veins of upper limbs follow arteries, most of them double to one artery • Superficial veins: see pic • Blood drawn from median cubital vein in antecubitalfossa

  8. Antecubital Fossa • Form anastomese frequently • Median cubital vein is used to obtain blood or administer IV fluids

  9. Systemic Veins • 3 major vessels enter Right Atrium: • SVC (superior vena cava) • IVC (inferior vena cava) • Coronary sinus • Many veins are very superficial (unlike arteries) • Venous plexuses (networks of anastomoses and parallel veins) are very common • Head and hepatic portal systems are unusual

  10. Inferior vena cava drains a. hepatic vein b. phrenic vein c. paired renal veins d. paired gonadal veins

  11. Body wall veins parallel the arteries.

  12. Common iliac vein Internal iliac vein External iliac vein Inguinal ligament Femoral vein Great saphenous vein (superficial) Great saphenous vein Popliteal vein Popliteal vein Anterior tibial vein Fibular (peroneal) vein Fibular (peroneal)vein Small saphenous vein (superficial) Anterior tibial vein Posterior tibial vein Dorsalis pedis vein Plantar veins Dorsal venous arch Plantar arch Metatarsal veins Digital veins (b) (a) Veins Of The Right Lower Limb And Pelvis

  13. Leg veins • Names similar to arteries • Femoral becomes external iliac after crossing under inguinal ligament • External iliac joins with internal iliac to form common iliac vein _________used for grafting in coronary artery bypass grafts: is the longest vein in the body

  14. Paired common iliac veins which drain (1) paired internal iliac veins (2) paired external iliac veins which drain (a) femoral veins which drain 1. popliteal veins which drain a. Peronealvein b. Anterior and posterior tibialveins (b) great saphenous veins

  15. Superior mesenteric and splenic veins join to form hepatic portal vein, which goes up into liver Inferior mesenteric empties into the splenic vein Kind of confusing… * *

  16. Tributaries of hepatic portal vein: -superior mesenteric vein -splenic vein -inferior mesenteric vein • Hepatic portal system • Picks up digested nutrients from stomach & intestines and delivers them to liver for processing and storage • Storage of nutrients • Detoxification of toxins, drugs, etc. • Two capillary beds • Route: artery to capillaries of gut to hepatic portal vein to liver’s capillaries to hepatic vein to IVC

  17. Fetal Circulation • The one umbilical vein brings blood which has been to the placenta for oxygenation (by gas diffusion from mom’s blood) • The pair of umbilical arteries (branches from baby’s internal iliac arteries) carry blood to placenta to pick up oxygen and nutrients • Fetal heart starts beating at 21 days post conception

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