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Lab 32

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  1. Lab 32 Blood Vessels BIOL242

  2. Vessels - Generalities • Peripheral distributions are the same on the left and right side of the body except near the heart. • Most arteries and veins follow similar paths and are often similarly named • One vessel can have several names (like a street) • Many tissues are serviced by several arteries and veins

  3. Veins - Generalities • Veins are far more variable from person ot person than arteries • Several veins, especially in the limbs, have superficial and deep routes. Superficial route usually only caries 10-15% of blood at a maximum and serves to aid in thermoregulation

  4. Vessels to know • Be able to identify the following arteries/veins on a model: inferior and superior vena cava, left and right pulmonary arteries and veins,, common carotid, subclavian, brachiocephalic, coronary • thoracic and abdominal aorta, celiac, renal, axillary, brachial, radial, ulnar, mesenteric, iliac, peroneal, femoral, popliteal, tibial, jugular, celiac, splenic, gastric, hepatic and saphenous.

  5. Major Systemic Arteries Figure 21-20

  6. Branches of the Aortic Arch • Deliver blood to head and neck: • brachiocephalic trunk • right subclavian artery • right common carotid artery • left common carotid artery • left subclavian artery

  7. Arteries of Upper Limbs Subclavian  axial  brachial  splits into radial, ulnar 3D Peel Away

  8. Descending aorta thoracic aorta  abdominal aorta  common illiac  to be continued renal

  9. 3 Unpaired Branches of the Abdominal Aorta • Celiac trunk, divides into: • left gastric artery • splenic artery • common hepatic artery • Superior mesenteric artery • Left mesenteric artery

  10. celiac gastric hepatic splenic mesenteric iliac

  11. Illiac  femoral  popliteal Posterior and anterior tibial. Posteror tibial gives rise to peroneal (fibular)

  12. Veins • Know the veins with the same names as arteries • Exceptions: • saphenous (leg) no comparable artery • jugular (neck) like carotid arteries

  13. Lab #32 • Look at 3 slides: • Artery • Vein • Aorta • For arteries, veins, and aorta, label the three layers and answer the questions • Look at models and diagrams to identify vessels for the practical exam

  14. Artery or Vein? • Arteries have high numbers of elastic fibers, which causes them to recoil when at low pressure (or empty). Causes: • folded or ridged endothelium (since it cannot contract) • constricted lumen (but appears round) • Veins do not constrict like this and they are less resiliant so they collapse in section. Causes: • smooth, unfolded endothelium. • lumens look flattened and oblong