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14 Cards in this Set
- Front
- Back
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What are the three types of blood vessels? |
Capillaries: Diffusion between blood and interstitial fluids Arteries: Carry oxygenated blood away from heart (with one exception) Veins: Return de-oxygenated blood to the heart (again, one exception) |
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What are the structures of the three types of blood vessels? |
Arteries: Elastic and muscular Capillaries: Single cell thick, site of gas diffusion Veins: Thin walls as it is reservoir for blood |
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What are the walls of the blood vessel? What are they made up of? |
Tunica externa = outside Tunica media = middle Tunica intima = inside |
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What do arteries branch off into? |
Arterioles: Smaller, contractile and somewhat elastic |
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What are the details of the endothelial structure of blood vessels? |
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What are the functions of the endothelium? |
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How do innervations of vessels work? (Contracting blood vessels etc to pump blood) |
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What are examples/functions of elastic and muscular arteries? |
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What are the three types of capillaries and what do they do? |
Continuous = Barely any fenestration but allows diffusion Fenestrated = Slight gaps Sinusoidal = Large gaps |
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What is the role of the venules? |
Draining the capillary network |
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How do valves work in the veins? |
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What are the mechanisms of venous return? |
- Pressure (7-13 mmHg venous pressure towards heart) -Thoracic/respiratory pump (inhaling causes pressure changing, causing a pumping motion) - Gravity - Skeletal muscle pump (in the limbs, below heart) |
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Summary of arterial and venous system |
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What are the two circuits of the heart? |
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