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Circulation
| Question | Answer |
|---|---|
| cardiopulmonary circulation | carries deoxygenated blood from the heart to the lungs, CO2 is exchanged for O2, and oxygenated blood returns to the heart |
| systemic circulation | carries blood, nutrients, O2, water, waste, and secretions throughout the body. Helps equalize body temp. Aids in protection from bacteria |
| brings oxygenated blood to heart muscle | coronary circulation |
| enables liver to remove harmful substances that have been digested before they enter systemic circulation; keeps blood glucose at acceptable range | portal circulation |
| fetal circulation | occurs with unborn baby |
| Does fetal blood mix with mother's blood? | No, the exchange of food, gases, and waste occurs through the umbilical cord. |
| carry oxygenated blood away from the heart to the capillaries | arteries |
| smaller branches of arteries that lead to capillaries | arterioles |
| tunica adventitia | outer layer of arteries; very elastic and allows arteries to be able to withstand the increase of pressure |
| tunica media | middle later of arteries. Controls the diameter of arteries by dilation and contraction |
| tunica intima | inner layer of arteries; smooth, allowing for easy flow of blood |
| smallest blood vessels that connect arterioles and venules, allow nutrients and O2 to exchange for waste and CO2 | capillaries |
| do arteries or veins have valves? | veins |
| What is the function of valves? | to prevent backflow of blood |
| carries deoxygenated blood away from the capillaries to the heart | veins |
| largest vein | vena cava |
| systolic BP | pressure measured at the moment of ventricle contraction. normal range: 100-120 |
| diastolic BP | pressure measured when the ventricles are relaxed. Normal range: 60-80 |
| how do you find pulse pressure? | systolic-diastolic. ex 120/80, 120-80=pulse pressure of 40 |
| a pulse pressure higher than this indicates higher risk of cardiac problems | 60 |
| Alternating expansion and contraction of an artery as blood flows through it | pulse |
| effects of aging | arteries are less elastic; systolic BP increases; pressure changes cause postural hypotension; aging heart is less able to handle increased work loads from stress, illness, and physical exertion |
| most common site to find a pulse | radial |
| weakening of a blood vessel resulting in ballooning out of an artery | aneurysm |
| walls of artery thicken | arteriosclerosis |
| fat deposits form on the walls of arteries. | atherosclerosis |
| death of body tissue due to a lack of blood supply usually due to disease or injury. | gangrene |
| inflammation of the lining of a vein | phlebitis |
| swollen veins that results from a slowing of blood flow back to the heart. | varicose veins |
| hemorrhoids | varicose veins in the rectum |
| bleeding from blood vessels in the brain | cerebral hemorrhage |
| blockage of arteries usually in legs. | peripheral vascular disease |
| risk factors of stroke | smoking, HTN, heart disease, family history |
| if you have a stroke on the left side, what side of the body is affected? | right |
| what does hemiplegia mean? | paralyzed on one half of body |
| what does FAST stand for? | face drooping, arm weakness, slurred speech, time to call 911 |
| Inadequate flow of blood carrying oxygen to the organs and body systems; can be caused by excessive blood loss or fluid loss, or inadequate pumping of the heart | hypoperfusion |
| Hypertension is also known as | the "silent killer" |
| Hypertension is anything above this BP reading | 120/80 |
| hypotension | BP reading less than 90/60 |
| warning sign of stroke | TIA |
| sudden interruption of blood flow to the brain resulting in loss of O2 to brain cells and death of those cells | stroke/cerebral vascular accident (CVA) |