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In the aorta the blood pressure and blood velocity are both high?
Wiki User
∙ 15y ago
The pressure in the aorta is essentially steady, with a descending gradient between that at the proximal aorta and its junction with major arteries, so the 'ambient' internal pressure steadily diminishes along the traverse. The injections of stroke volumes of blood (initially at systolic pressure) do give rise to transient peaks of pressure at the central aorta, but these do not raise the pressure of the body of the elastic plenum comprising the aorta and larger arteries significantly, because the injected stroke volume is almost negligible in comparison. However, because the injected volume displaces blood already in the aorta, the walls expand with the additional pressure, and this mechanism sets a longitudinal traveling pulse pressure wave in motion. As it passes any point along its path a transient peak of pressure is observed, but this performs no work on the moving blood -apart from almost negligible losses en passant. So, the speed of the steady flow of blood is slow. The pressure peaks are higher. The speed of the pulse pressure peaks is high The expression 'the blood pressure' is meaningless in this context because it varies constantly all along the gradient existing along the arterial tree.
Wiki User
∙ 15y ago
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List in order the arteries as they leave the heart?
Since both sides of the heart contract at the same time, the right ventricle pumps blood into the pulmonary trunk, and the left ventricle pumps blood into the Aorta.
What does aorta and vena cava do?
The Vena Cava carrys de oxygenated blood that is returning from the body and into the right atruim of the heart and the Aorta is the largest artery of the body which transports oxygenated blood to the rest of the body.Hope this helps.Shirley
How do the valves in the aorta work?
During ventricular systole both ventricles contract, forcing the blood out of them and into another vessel. The left ventricle is the one that provides blood to the rest of the body. As it contracts, the high pressure causes the aortic semilunar valve to open, and blood travels through it to the aorta.
What is the pressure in the arteries during relaxation of the ventricles called?
Blood can only enter an artery, be it the aorta, when the left ventricle contracts, or the pulmonary arteries, when the right ventricle contracts, which both occur at the same time after ventricular systole which is contraction. Therefore, the answer is contract.
What does aorta is partially calcified mean?
The Aorta is one of the hearts blood vessel's Have you ever seen an old water pipe that has a buildup around the inside surface of the pipe consisting of rust calcium and other rubbish which reduces its ability to let water through? well the same thing can happen with the blood vessels as a result of age diet or both.
What is the major artery that carries blood away from the heart?
You have aorta or systemic aorta that arise from your heart. This very big artery arise from the left ventricle. You have a big pulmonary aorta, that arise from your right ventricle. The systemic aorta is the bigger than pulmonary aorta. Although both of them carry the same amount of blood.
How does The appearance of the pulmonary artery compare with that of the aorta?
Both of them are arteries. Pulmonary artery supplies blood to lungs whereas Aorta supplies blood to all other parts of the body. Both of them are the outlets of the heart. Pulmonary artery is a part of pulmonary circulation while Aorta is a part of systemic circulation.
What is the lowest diastolic pressure heart can tolerate?
When after contraction of ventricles of heart, blood is propelled into circulatory system (both systemic and pulmonary circulation) and that pressure is called systolic pressure, witch dilates the aorta and large(and small also) arteries. When ventricles relax in diastole aortic (and pulmonary) valves close down and then aorta and large (and small also)arteries contract, witch are dilated during systole. Peripheral resistance in closed system maintain the lower blood pressure called diastolic blood pressure.
How would your body be different without aorta?
The Aorta is the perhaps the most important of the 4 blood vessels of the heart. The Aorta is an Artery meaning that it takes blood away from the heart. The Aorta is particularly important because it supplies the entire body, except the lungs, with oxygenated blood. It's pretty safe to say that without the Aorta, you would either be dead, make a big mess of blood, or both! Hope this helps.
Is a aorta a blood vessel?
The aorta is the largest artery in the human body. It is usually medically divided by anatomical division or by direction of blood flow. Thus, there is the abdominal aorta or the ascending aorta, which can refer to the same artery.
Why you should check blood pressure in both arms?
usually blood pressure in not checked in both arms
List in order the arteries as they leave the heart?
Since both sides of the heart contract at the same time, the right ventricle pumps blood into the pulmonary trunk, and the left ventricle pumps blood into the Aorta.
What does aorta and vena cava do?
The Vena Cava carrys de oxygenated blood that is returning from the body and into the right atruim of the heart and the Aorta is the largest artery of the body which transports oxygenated blood to the rest of the body.Hope this helps.Shirley
Can emotional state influence blood pressure?
Yes. Blood pressure is dependent on emotional state. Both happy and angry emotional state can trigger blood pressure.
What divides the thoracic aorta from the inferior abdominal aorta?
The diaphragm divides the thoracic and abdominal aorta. These are both parts of the descending aorta, extending from the aortic arch.
How does the elasticity of aorta and vena cava relate to its ability to withstand pressure?
It is a very good question to answer. Pressure in Aorta is 120 mm of mercury and speed of blood flow is 50 cm/ second.Aheadis peripheral resistance of capillaries, which are smaller in diameter than R.B.Cs, flowing through it.(It's a fact.) As left ventricle contract blood ispumpedin the aorta, large and small arteries. Now aorta is thick and muscular and elastic and along with entire arterial system, it dilates. When left ventricle relaxes, aortic valve close down. Now this entire arterial system contracts and maintains the diastolic blood pressure. Peripheral resistance has very important role to play in this. So it takes kinetic energy in systole and gives away in diastole. So in diastole aortic system works as a 'Heart'. In comparison pressure is very low in inferior venacave. Go onmeasuringthe height of from feet to heart. This much is the pressure in inferior vena cave as you ascend in term of mm of 'water' at that particular height in verticle position.(Density of mercury is 13.6.) For superior vena cave blood 'falls down' and pressure may be zero to minus. So both vena cave have very large diameter together. 10 to 12 times that of aorta and they are very thin walled and almost nonelastic.
When the heart muscle contract?
The heart muscle, myocardium, contracts when in the systolic phase, which is the part when the blood is being pushed out of the left ventricle into the aorta. The wall of the left ventricle tends to be much thicker than than the right ventricle because of the amount of of pressure it exerts the oxygen rich blood into the aorta. Seeing as though the heart is a muscle, if it is worked more, it gets stronger. The myocardium is an involuntary muscle that is controlled by both intrinsic and extrinsic factors.
