Lab #4: Blood Vessels/Vasculature
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14 Terms
Arteries
Blood flow AWAY from heart
Low CO2, High O2
High pressuere
Veins
Blood flow TOWARDS heart
High CO2, Low O2
Low Pressure
Capillaries
Thin walls
Site of exchange
Pulmonary Circulation
System of blood vessels that forms a closed circuit between the heart and the lungs.
What is an “anomaly” about pulmonary circulation?
It has deoxygenated arteries, and oxygenated veins.
Hepatic Portal Circulation
Capillary to capillary
Fetal Circulation
Structures named for the child’s
heart, not the oxygenation:
• Shunts to by-pass areas (Foramen
Ovale, Ductus Arteriosus, Ductus
Venus)
Tunica Intima
Smooth, thin endothelium
Tunica Media
Smooth muscle and elastic tissue
Tunica Externa (Adventita)
Connective tissue; provides support
Vasa Vasorum
Supply blood to large arteries & veins
What is #1 in this image?
Endothelium (Tunica Intima)
What is #2 in this image?
Smooth muscles and elastic fibers (Tunica Media)
What is #3 in this image?
Connective tissue (Tunica Externa)
Note 
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