GUWS Medical

Procedure B The Venous System

1. Examine the heart again, and locate the following veins:

anterior vena cava (corresponds to superior vena cava)

posterior vena cava (corresponds to inferior vena cava)

2. Using figure 47.5 as a guide, locate and dissect the following veins in the thorax and neck:

right brachiocephalic vein left brachiocephalic vein right subclavian vein left subclavian vein internal jugular vein external jugular vein

Figure 47.4 Arteries (red) and veins (blue) of the abdominal cavity of a fetal pig, ventral view.

Posterior vena cava

Renal vein

Kidney

Internal iliac artery

Internal iliac vein Umbilical arteries

Umbilical vein

Figure 47.4 Arteries (red) and veins (blue) of the abdominal cavity of a fetal pig, ventral view.

Posterior vena cava

Renal vein

Kidney

Internal iliac artery

Internal iliac vein Umbilical arteries

Umbilical vein

Celiac trunk

Anterior mesenteric artery Abdominal aorta

Renal artery

Posterior mesenteric artery Common iliac vein

External iliac artery External iliac vein Femoral artery Femoral vein Deep femoral artery Deep femoral vein

Great saphenous vein

Celiac trunk

Anterior mesenteric artery Abdominal aorta

Renal artery

Posterior mesenteric artery Common iliac vein

External iliac artery External iliac vein Femoral artery Femoral vein Deep femoral artery Deep femoral vein

Great saphenous vein

3. Trace the right subclavian vein into the forelimb, and locate the following veins:

axillary vein brachial vein

4. Using figure 47.4 as a guide, locate and dissect the following veins in the abdomen:

posterior vena cava renal veins common iliac vein internal iliac vein external iliac vein

5. Using figure 47.6 as a guide, locate and dissect the following veins (branches of the hepatic portal system):

hepatic portal vein gastrosplenic vein mesenteric vein anterior mesenteric vein (corresponds to superior mesenteric vein)

posterior mesenteric vein (corresponds to inferior mesenteric vein)

6. Locate and trace the umbilical vein (that was cut) from the umbilical cord into the liver. Inside the liver it becomes the ductus venosus, which drains oxygenated fetal blood into the posterior vena cava. The umbilical vein and the ductus venosus degenerate after birth.

7. Trace the external iliac vein into the left hindlimb (see figure 47.4), and locate the following veins:

femoral vein deep femoral vein great saphenous vein

8. Complete Part B of the laboratory report.

Figure 47.5 Veins of the trunk, neck, and forelimb of a fetal pig, ventral view.

Axillary vein Brachial vein

Right subclavian vein Right brachiocephalic vein

Lung

Figure 47.5 Veins of the trunk, neck, and forelimb of a fetal pig, ventral view.

Axillary vein Brachial vein

External jugular vein Internal jugular vein Left subclavian vein

Left brachiocephalic vein Anterior vena cava

Posterior vena cava

Lung

External jugular vein Internal jugular vein Left subclavian vein

Left brachiocephalic vein Anterior vena cava

Posterior vena cava

Figure 47.6 Hepatic portal vein and its tributaries of a fetal pig, ventral view. The liver and stomach are retracted to obtain a clear view.

Liver

Gallbladder Hepatic portal vein

Anterior mesenteric vein

Small intestine

Figure 47.6 Hepatic portal vein and its tributaries of a fetal pig, ventral view. The liver and stomach are retracted to obtain a clear view.

Liver

Gallbladder Hepatic portal vein

Anterior mesenteric vein

Small intestine

Stomach

Spleen

Mesenteric vein Posterior mesenteric vein

Large intestine

Stomach

Spleen

Mesenteric vein Posterior mesenteric vein

Large intestine