BIOL 204

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BIOL 204 Week 5 Lab

• Special Pathways of Circulation
• Cat Vasculature

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Objective 1 Pulmonary Circulation Functions
to bring deoxygenated blood to the lungs for gas
exchange and to bring oxygenated blood back to
the heart for distribution to body
systems Unlike systemic circulation, pulmonary
circulation 1. is a low pressure
pathway 2. arteries carry deoxygenated blood
veins carry oxygenated blood
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Objective 2 Trace The Flow of Blood IN
Pulmonary Circulation
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Objective 3 Cerebral Circulation
Arteries Basilar Artery Vertebral
Artery Internal Carotid Artery External Carotid
Artery Common Carotid Artery Subclavian
Artery Axillary Artery Brachiocephalic Artery
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Vessels of the Circle of Willis
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Sheeps Brain Structures of the Circle of Willis
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Venous Drainage
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• Objective 4 and 5 Hepatic Portal Circulation
• Hepatic portal circulation consists of veins
  that drain blood from digestive viscera, the
  spleen and pancreas and deliver that blood to the
  liver for processing
• Remove, store and bioconvert sugars, fatty acids
  and amino acids
• Detoxification of the blood
• Remove bacteria and other debris

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• Hepatic Portal System in the Cat
• Superior Mesenteric Vein C. Hepatic Portal Vein
• Inferior Mesenteric Vein D. Gastrosplenic Vein

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Objective 6 and 7 Fetal
Circulation The structures of fetal circulation
allow the placenta to function as an organ for
nutrient, waste and gas exchange
Note that the Umbilical arteries carry
deoxygenated blood and that the umbilical veins
carry oxygenated blood The ductus venosus allows
most blood to bypass the nonfunctional fetal
liver The foraman ovale and the ductus arteriosus
allows most blood to bypass the nonfunctional
fetal lungs
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Umbilical Arteries and Umbilical Vein of a
Fetal Umbilical Cord
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Objective 8 Cat Dissection
Sorry this is the only picture that I could
find to show the cutting lines !!!!!!!!!!!!!!!!!!!
!!!!!!!
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Abdominal Aorta G - Adrenolumbar Artery
B - Celiac Trunk H - Renal Artery
C - Hepatic Artery I - Gonadal Arteries
D - Left Gastric Artery J - Inferior Mesenteric Artery
E - Splenic Artery K - Iliolumbar Artery
F - Superior Mesenteric Artery L - Femoral Artery
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1. Superior Mesenteric Artery
2. Celiac Trunk

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Cats do note have a common iliac artery They
do have internal and external iliac arteries
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