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Vessel Models

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Artery and two veins model

You can tell which is which by looking for the valves. Veins have valves and arteries don't. The composition of the vessel walls is another giveaway.

You can tell which way blood is flowing by looking at the valves themselves and determining which direction would close the valves and which direction would allow blood flow. Another less sure way is to see where the two veins join. Veins tend to become less numerous as you move toward the heart. On the other hand, some venous systems freely anastomize, so that's not as good as looking at the valves.

The flow of blood in the artery is opposite that in the veins.

  1. Tunica intima (endothelium; subendothelial layer not shown)
  2. Internal elastic lamina, arteries only
  3. Tunica media
  4. External elastic lamina, arteries only
  5. Tunica externa
  V. Valves
ESP Vein and Artery

ESP Vein and artery model

  1. Nutrient supply to vasa vasorum
  2. Tunica intima of artery
  3. Tunica media of artery
  4. Tunica externa of artery
  5. Anastomosis between arteries and veins
  6. Tunica interna of vein
  7. Tunica media of vein
  8. Tunica externa of vein
  9. Capillary bed
  10. Valve in vein lumen
  11. Nerve plexuses (in yellow)

Torso: Great vessels

  1. L/R subclavian veins
  2. L/R internal jugular veins
  3. L/R brachiocephalic veins
  4. Superior vena cava
  5. Aorta
  6. Brachiocephalic artery.
    Note: there is only one brachiocephalic artery, on the right. It arises from the aortic arch and divides into the right common carotid artery and the right subclavian artery. On the left, those vessels arise directly from the aortic arch.
  7. L/R common carotid arteries
  8. L/R subclavian arteries
Torso Upper Abdomen Arteries

Torso: Upper abdomen arteries

  1. Right renal artery
  2. Celiac trunk
  3. Superior mesenteric artery
  4. Left renal artery
  5. Right gonadal artery
  6. Left gonadal artery
  7. Inferior mesenteric artery
Torso Upper Abdomen Veins

Torso: Upper abdomen veins

  1. Right renal vein
  2. Inferior vena cava
  3. Left renal vein
  4. Right gonadal vein
  5. Left gonadal vein
    Note: The right gonadal vein empties into the inferior vena cava, while the left gonadal vein empties into the left renal vein.
Torso Lower Abdomen

Torso: Lower abdomen

  1. Left common iliac artery
  2. Left common iliac vein
  3. :eft internal iliac vein
  4. Left external iliac artery
  5. Left internal iliac artery
  6. Left external iliac vein
    Note: All of these vessels are paired so there is a corresponding vessel on the right side.
Urinary Model

Urinary model
(for vessel anatomy)

This model has many of the same vessels as the torso, i.e. renal arteries and veins, common, internal, and external iliac arteries and veins, and gonadal arteries and veins. The only ones labeled here are the three unpaired branches of the aorta, which usually confuse students on this model. Compare to the torso model, above (upper abdomen/arteries).

  1. celiac trunk
  2. superior mesenteric artery
  3. inferior mesenteric artery
Aortic aneurysm

Aortic aneurysm

Unfortunately, we no longer have this specimen in our collection.