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Capillaries
| Question | Answer |
|---|---|
| What can be palpated and used clinically as pulse points? | provides strength and elasticity so can withstand forces of high blood pressure |
| What can be used for pulse determination in horses and cattle? | Lateral and medial digital arteries found on both front and hind limbs. |
| What direction do veins move blood? | TO the heart |
| Veins are just as strong as arteries T/F | False veins are thinner and less muscular than arteries |
| Since the blood in veins are under less pressure, how do they keep blood flowing? | there are intravenous unidirectional valves to keep blood flowing ONE way |
| What is the largest vein? | Vena Cava (divided into cranial and caudal portions) |
| Are veins or arteries more commonly used for blood collection? | Veins are freq. used for blood collection |
| What are the most common blood draw sites? | Jugular vein, cephalic vein, medial saphenous vein, lateral saphenous vein, and femoral vein |
| Another word for blood draw | Phlebotomy |
| When you see this card compare arteries and veins in your head, then flip to see the answers | Arteries • Carry blood away from the heart • Have thicker, more muscular walls • Under more pressure than veins Veins • Carry blood back to the heart • Have thinner walls • Have unidirectional valves due to being under less pressure |
| What is the order from biggest to smallest when it comes to arteries? | Aorta->Arteries->Arterioles->Capillaries |
| What is the order from biggest to smallest when it comes to veins? | Vena cava->veins->venules->capillaries |
| Smallest and thinnest walled vessels. | Capillaries |
| Capillaries are the critical connections b/w arterioles and venules T/F | True |
| Why are capillaries so important? | Very permeable to blood gasses and “leaky” making it the site for oxygen transfer keeping us alive. This also allows for plasma to seep out of bloodstream and percolate through the interstitium, eventually being absorbed by the lymphatic vessels |
| WHat type of membranes are full of capillaries? | Mucous membranes are packed with capillaries – so on exam we always evaluate membrane color. |
| How is blood pressure measured and what is it measuring? | Measured in mm of Hg (millimeters of mercury) Measuring arterial pressure |
| How is blood pressure written? | Systolic/diastolic Systolic=pressure when the ventricles contract Diastolic=pressure when ventricles are relaxed |
| Normal BP for dogs and cats | 120/80 |
| Hypotension | Low blood pressure |
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