Question | Answer |
What are the 3 types of Blood Vessels? | 1. Arteries; 2. Veins; 3. Capillaries |
What is the function of Arteries? | carry OXYGENATED blood AWAY from the Heart |
What are the tissue layers of the Artery? | 1. Tunica Interna; 2. Tunica Media; 3. Tunica Externa |
What is the composition of the Tunica Interna? | Simple Squamous Epithelium (Endothelium) over thin layer of Elastic Connective Tissue |
What is the function of the Tunica Interna? | prevent TRAUMA to Blood Cells |
What is the composition of the Tunica Media? | Elastic Fibers over Circular Smooth Muscle |
What is the function of the Tunica Media? | involved in Vasoconstriction |
What is the composition of the Tunica Externa? | Elastic & Collagenous Fibers |
What is the benefit of Elastic Fibers within the Tunica? | Strengthen in order to prevent Aneurysm (widening) and Rupture |
What are Arterioles? | the SMALLEST Arteries |
What is the function of Veins? | carry DEOXYGENATED blood TOWARD Heart |
What are the tissue layers of Veins? | 1. Tunica Interna; 2. Tunica Media; 3. Tunica Externa |
How does the Tunica Interna of Veins DIFFER from that of Arteries? | LESS Connective Tissue than Arteries of similar size |
How does the Tunica Media of Veins DIFFER from that of Arteries? | LESS Smooth Muscle than Arteries |
How does the Tunica Externa of Veins DIFFER from that of Arteries? | slightly THICKER than Arteries |
Is there a difference in blood pressure between Veins and Arteries? | Veins have LOWER blood pressure than Arteries |
What type of Blood Vessels are largest in diameter? | 1. Veins; 2. Arteries |
Which Blood Vessels have the thickest wall in total? | Arteries - to prevent Aneurysm |
Which type of Blood Vessels are collapsible? | Veins |
What are Venous Valves? | 2 Endothelial Flaps which prevent back flow - especially in Veins BELOW Heart |
What are Capillaries? | MICROSCOPIC vessels carrying blood between Arterioles and Venules |
What are Venules? | the SMALLEST Veins |
Capillaries contain how much of the body's blood supply? | 10% at one time, capable of containing 100% |
How many tissue layers do Capillaries have? | 1 = Tunica Interna --> Simple Squamous Epithelium |
What is the function of Capillaries? | permits DIFFUSION of O2/CO2, Nutrients, and Wastes to/from adjacent tissue cells |
What is the main function of the Circulatory System? | exchange of O2 and CO2, nutrients and wastes in tissues |
What is the function of Arterioles? | drop off O2 to the Capillaries |
What is the function of Venules? | to remove CO2 and Wastes from Capillaries |