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28 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Vena Cavae
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1) Deoxygenate blood enters the heart *VIA THE VENA CAVAE* which is also the largest vein in the body. Blood here dumps into the Right atrium
2) The AV (atrioventricular) valve between the right atrium and right ventricle is closed, allwoing the right atrium to fill up with blood, the pressure inside this chamber increases. |
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Right AV Valve |
3) Once the pressure in the right atrium exceeds the pressure in the right ventricle, The RIGHT AV VALVE will open so the blood from the right atrium can be pushed into the RIGHT VENTRICLE 2) Thus the PULMONARY VALVE... |
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Pulmonary Valve
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4)..closes so that the right ventricle can fill with blood.
5)As the right ventricle fills with blood the pressure inside this chamber will increase. Once the pressure inside the right atrium, the right AV valve will close so that no more blood enters the right ventricle, and then the pulmonary valve will open so the right ventricle can pump the blood out of the through the pulmonary valve into the pulmonary artery. |
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Pulmonary Arteries |
6)they take blood to the lungs, where CO2 will be exchanged for O2. *Oxygenated blood returns to the heart via the pulmonary veins.
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Pulmonary Vein
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7)Dumps the oxygenated (the only vein in adults to carry oxygenated blood) blood into the LEFT ATRIUM
8) As the left atrium fills with blood, the pressure inside this chamber will increase. Once the pressure in the left ventricle, the LEFT AV VALVE will open so that the blood from the left atrium can... |
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Left Ventricle |
9)..be pushed into the left ventricle. 1) As the left ventricle fills with blood, |
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Aortic Valve |
10theAORTIC VALVE, (the valve thru which blood leaves the left ventricle) will be closed so that the left ventricle will fill with blood. 11)As the left ventricle fills with blood the pressure inside this chamber will increase. 12)once the pressure inside the left ventricle exceeds the pressure in the left atrium, the LEFT AV VALVE will close so that no more blood will enter the left ventricle, and then the aortic valve will open so that the left ventricle can pump the blood out of the heart into the... |
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Aorta |
13) AORTA. 14) The oxygenated blood is now on its way to the cells throughout the body. 15) The aorta branches into arteries, and then become smaller arterioles until they become capillaries, which is where the cells will pick up the oxygen and the nutrients they need and the blood picks up dioxide and metabolic wastes from the cells. |
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Capillaries (final step) |
16) From here , the Cappillaries, the blood vessels merge into large blood vessels called venules that become veins that eventually all merge into the vena cavae. |
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What order does blood flow?
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1) Capillaries
2) Venules 3) Veins 4) Vena Cavae 5) Right Atrium 6) Trisupsid Valve 7) Right Ventricle 8) Pulmonary Semilunar Valve 9) Pulmonary Arteries 10) Lungs ~pulmonary capallaries 11) Pulmonary Veins |
13) Left AV Valve Bicuspid
14) 15) Aortic Semilunar Valve 16) Aorta/Aortic Arch 17) Arteries 18) Arterioles 19) Back to Cappillaries |
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Systole
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describes when the cardiac muscle tissue when it is contracting.-When Atria go through the systole phase, they push blood into the ventricles-When the ventricles go through the systole phase, they eject boold into the arteries-In the diastolic phases, atria and ventricles fill with blood passively.
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ECG |
The electrocardiogram shows the depolaration of a heart on a neato graph. The three waves it has are the P-wave, QRS-wave, and T-wave. |
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P-wave |
When atria depolarize/contract at the same time. |
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QRS-wave |
When ventricles depolarize/contract at the same time. |
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T-wave |
Both ventricles re-polarize at the same time. |
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Side facts about waves
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1) Both atria re-polarize at the same time, but this peak is masked by the larger QRS-wave 2) The re-polarization (relaxing/refilling with blood) of the atria occurs at the same time as the depolarization of the ventricles. 3) Since there are more muscle cells in the ventricle walls, the ventricles have a greater electrical change and as such their QRS-wave covers (hides) the peak for the re-polarization of the atria. |
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Quick Graph!: ECG Waves |
P-wave: Atria depolarization QRS-wave: Ventricular depolarization T-wave: re-polarization of ventricles Hidden Wave: repolatzation of atria |
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SA node |
Sinoatrial Node: pacemaker/initiator of heart contraction, which is a specialized cluster of muscle cells in the upper portion of the right atrium. Depolarization of the SA node quickly spreads through both atria causing contraction in unison. |
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AV node |
Atrioventricular Node: Along with the Bundle of His allow the depolarization to travel from the atria to the ventricles. -AV node is located in the bottom of the right atrium near the division btwn the four chambers of the heart. -AV node depolarizes and passes this depolarization to the Bundle of His causing it to depolarize. |
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Bundle of His |
This is deep in the tissue dividing the four chambers of the heart, and it runs to the bottom of the ventricles-which is the heart apex or the point at the bottom of the heart. It connects to the Purkinje Fibers. |
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Purkinje Fibers |
connected to the Bundle Of HIS IN the ventricles, the purkinge fibers run to the myocardial cells of the ventricles. -Once the Bundle of His depolarizes and causes the purkinje fibers to depolarize, the muscle cells of the ventricles depolarize and then contract. -The ventricles contract in unison, from the bottom (apex/point) of the ventricles to the top of the ventricles. - Pulmonary valve and aortic valve exits the top of the ventricles -when ventricles contract from the bottom apex point, then go to the top of the ventricle, all the blood can be squeezed out the heart. |
last step: much like squeezing a tube of toothpaste from the bottom of the toothpaste tube |
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Quick Graph: electrical current/contraction of cells in the heart |
1) SA automatically depolarizes 2) Both atria depolarize and contract 3) AV Node slowly depolarizes causing a lag period (pause) in which the atria contract prior to the ventricles depolarizing and contracting. 4) The wave of depolarization travels down the Bundle of His 5) The wave of depolarization finales by traveling up the Purkinje Fibers 6) Both ventricles depolarize and contract, beginning at the bottom (apex/point) of the heart and continuing up the top of the ventricles. |
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Why does the AV node slowly depolarize in order to create a lag phase (pause) in which the atria contract prior to the ventricles depolarizing and contracting? |
To coordinate the movement of blood and allow the atria to fill |
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Pulse Volume/ Volume Pulse = ____1___ |
1) Pulse Wave Amplitude |
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Vasodilation |
increases in diameter of the vessel. Bigger the vessel, the more blood that flows through. |
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Vasoconstiction |
Reduction in the diameter of the vessel. |
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Volume Pulse is:
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the amount of blood being pumped thru the blood vessels with each beat of your heart. |
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Active Hyperemia |
When the organs and tissues engage in increase blood flow which also increases metabolic activity. |
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