Term
| These vessels carry blood Away from the heart. |
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Definition
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Term
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Definition
| Innermost layer of arterie composed of simple squamous, elastic. |
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Term
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Definition
| Middle layer composed of smooth muscle for vasoconstriction. This will regulate BP. |
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Term
| What layer is the externa |
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Definition
| outside layer, feeding the three layers with nutrients. |
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Term
| What are the three types of Arteries, |
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Definition
| Elastic, Muscular Distributive, and Arterioles |
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Term
| What are the Elastic Arteries? |
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Definition
| Pressure reservoirs, where pressure is the highest. These would be aorta, and ones in the neck. |
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Term
| What are muscular distributive arteries? |
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Definition
| Smaller diameter, further away from the heart. Bringing blood to the organs. More muscle contraction in them, dont wantt to overflow the organs. |
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Term
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Definition
| microscopic, lead into the capillaries. These make the precapillary sphincters, so these control when blood turns on and how hard and fast it flows. |
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Term
| If tissue oxygen is low, what do the sphincters do? |
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Definition
| The sphincters would open. |
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Term
| What if you are working out, what do these spinchters do? |
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Definition
| sphinchters will shut off flow to the stomach, and flow blood to muscles and heart. |
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Term
| What is the BP of Aorta? Why? |
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Definition
| 120/80, goes a longer distance. |
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Term
| What is the BP of the arterioles, why? |
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Definition
| 40mm, because as blood flows down the body, it gets less and less force. |
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Term
| What is the BP of the capillaries and why? |
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Definition
| 20mm, since the blood is further down the body it is dropping in force again. |
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Term
| What is the BP of the venous? |
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Definition
| 20mm because it is oxygen poor blood once again loosing more force. |
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Term
| What is the BP of the right atrium? |
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Definition
| 0-2mm, by the time it reaches the heart, it has no more force. |
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Term
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Definition
| smallest blood vessel, circulation to tissues, have pores to allow diffusion of oxygen. |
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Term
| What are continous capallaries, what are they found? |
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Definition
| tight pored, found in lungs and brain. |
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Term
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Definition
larger pores, found in kidneys, in stomach, endocrine system.
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Term
| What are sinusoid capillaries? |
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Definition
| larger pored, in the spleen, marrow |
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Term
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Definition
| Connects arterioles to venules, by passes your capillary bed, so no diffusion. |
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Term
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Definition
| They are tiny vessels, that carry blood from the capillaries to veins. Remmber the Bp of these is 20. These are carrying blood to the heart. |
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Term
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Definition
| Thinner, but larger lumen, Bp is 10mm, bringing blood towards the heart, merging to the vena cavae. Valves assist in flow. |
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Term
| Compare arteries and veins? |
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Definition
| Arteries have thicker muscle, veins have valves to flow up wards, veins have the larger lumen, but thinner layers, veins flow towards the heart. |
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