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Circulatory System
Circulatory System is the category for questions about the human circulatory system, including questions about the human heart, arteries, and veins.
2,116 Questions
Why can people with type AB blood can accept transfusions of any type blood and Explain?
Because their body recognizes the A and the B types of blood, and O is recognized by all types because it has no genes
Why does certain places on your body hurt when you push on your skin?
All this means is that the part of skin you are pushing on the nervous tissue is communicating with somewhere else in your body and when you push on that part of skin it will tell the place that it is communicating with that it is feeling pressure.
The parasympathetic nerves secrete norepinepherine at the AV node (the pacemaker), which slows the heart and reduces stroke volume (the amount of blood the ventricles pump out with each cycle.
Sympathetic nerves do the opposite; they secrete epinepherine at the AV node, which stimulates the heart to increase speed and stroke volume, so that more blood is pumped from the heart faster.
Why do blood has to move around the body continously?
If you don't have blood pumping around the body, the heart wouldn't be able to get everything it need in the blood stream to work and if the heart doesn't work most of your muscles won't work either causing you to die. :(
What are the two pathways that the blood takes?
In the most general sense, and considering mechanics of the blood as the focus, the blood follows a pathway: 1) away from the heart, and a pathway: 2) back toward the heart. But with a little more detail, you can consider the number of pathways to be four:
- Away from the heart, toward the lungs via the pulmonary artery
- Away from the lungs, toward the heart via the pulmonary veins
- Away from the heart, toward the body via the aorta
- Back toward the heart from the body, by way of the system of veins
The pulmonary arteries are the only arteries that carry oxygen-spent blood [toward the lungs], and the pulmonary veins are the only veins to carry oxygen-rich blood from lungs back to heart and out to body]. Umbilical veins and arteries are exceptions to the general rule also, but they exist only during fetal development in pregnant women.
This probably won't get you any points in anatomy class, but if you stop to think about functionality as the focus of the question and not mechanics, the two pathways would be:
- Away from the lungs, to supply oxygen to all tissues requiring it
- Toward the lungs where the oxygen-spent blood is oxygenated
What are the symptoms of human circulatory system and how to prevent and cure them?
The human circulatory system is a very serious disease that will sometimes cause you to die. First of all you will start vomiting and having violent diarrhea later on with huge boils and feverish itchy red skin which later develop into crusty sores. this disease is highly infectious so the patient must be isolated in a well ventilated room very much away from others including family members, however this disease is easy to prevent by drinking blood from 7 different animals along with human blood every meal.
Does the systematic circuit only contain oxygen-rich blood?
The simple answer is no...BUT...the correct answer is half the time. A circuit is a continuous path which, when followed in one direction, returns to the starting point.
There are two interactive circuits in the human circulation system -- Systemic and Pulmonary. Think of a figure 8 toy train track. The heart is the 'main station' at the intersection of the two loops. On one end, imagine a Lungs 'substation'. At the other end, the Body 'substation.' Our blood travels endlessly on the figure-8 tracks in circuits like this:
Systemic circuit -- Heart-to-body and back, and then...
Pulmonary circuit-- Heart-to-lungs and back.
The Systemic circuit delivers oxygenated blood to the body via our arteries (arterial system); collects wastes (carbon dioxide) and returns the deoxygenated blood to the heart through our veins (venous system). Then the blood must be cleaned by the Pulmonary circuit.
The Pulmonary circuit: The heart pumps deoxygenated blood (with carbon dioxide waste) to the lungs. Diffusion occurs whereby carbon dioxide leaves the cells and oxygen enters them. The waste is expelled as we breathe out and more oxygen is taken in as we breathe in. The now oxygenated blood is returned returned to the heart.
Thus, our blood is circulating constantly, half the time delivering oxygen from the heart TO the cells in our arteries and the other half of the time retrieving carbon dioxide FROM our cells back to the heart in our veins.
How the blood travels:
From the body cells, oxygen-depleted blood travels through veins to the heart where it enters via the Superior Vena Cava or the Inferior Vena Cava. This oxygen-depleted blood flows into the Right Atrium and through the Tricuspid Valve down into the Right Ventricle. Then it flows up through the Pulmonary Semilunar Valve through Pulmonary Arteries to the Lungs. In the lungs, a passive process -- called diffusion, occurs wherby carbon dioxide is dropped off and oxygen picked up via gas exchange.
The oxygenated blood then travels from the lungs back to the heart via the Pulmonary Veins into the Left Atrium; down through the Mitral Valve and into the Left Ventricle thereby oxygenating the heart. Next the oxygenated blood continues up through the Aortic Semilunar Valve and out through the Aorta which forks into major arteries that supply the upper and lower body. The oxygenated blood flows through the arteries, then through smaller arterioles onto tiny capillaries and finally alveoli. In the Alveoli the gas exchange of oxygen and carbon dioxide occurs, feeding the cells and relieving them of waste. The 'waste'/de-oxygenated blood travels back to the heart in our veins.
What are the 4 chambers of uor circulatory system and its funktion?
- Right atrium:- receives all the deoxygented blood from the body
- Right ventricle:-it pumps the blood to the lungs by pulmonary artery
- Left atrium:-it receives the oxygenated blood from the lungs
- Left ventricle:-it pumps the oxygented blood from heart to whole body through aorta.
What five molecules things move through the circulatory system.?
Hydrogen sulphate, O2, fenoxycarb (IV), CO2 and iron ferrite
Do humans have an opened or closed circulatory system?
Humans have a closed circulatory system, in which blood is pumped by the heart through dedicated vessels, where it stays contained, as opposed to an open circulatory system (usually found in invertebrates) where blood is pumped out of the heart and vessels.
Why the blood does not clot in circulation despite having all the coagulation factors present?
Because coagulation requires a combination of platelet activation, activation of coagulation cascade (by trauma or damaged endothelial walls), and in predisposed individuals, abnormalities in regulator proteins such as protein C and anti-thrombin
What factors are considered when recommending an oxygen delivery system for a patient?
A health care provider will meet with the patient to discuss the oxygen systems available.
Can the excretory system work without a healthy circulatory system?
It will not work because if the heart, which is part of the circulatory system, has an infection the kidneys cannot work properly.
Peritubular capillaries
Describe percutaneous transluminal coronary angioplasty treatment for ischemia?
Percutaneous transluminal coronary angioplasty is a nonsurgical procedure in which a catheter tipped with a balloon is threaded from a blood vessel in the thigh into the blocked artery to open the artery.
Does bruising mean poor circulation?
A bruise does not mean that you have poor circulation. Healthy persons can also have it because it is basically caused by trauma or injury. The blood vessel was injured, allowing blood to "escape" the vessel and go towards neighboring tissues.
Does blood circulate through the body in 5 minutes?
Blood does not circualate through the body in 5 minutes so this question is false. It actually takes 23 seconds to circulate around your body.
B.D
What are the steps taken by the government to create awareness regarding project tiger?
This is because we should save tigers
How does medicine work to treat Coronary Artery Disease?
Examples only -
Aspirin reduces the likely hood of clotting by inhibiting platelet clumping.
Nitro decreases the output pressure of the heart (and thus the work per stroke).
Statins (and related drugs) reduce the cholesterol in the blood (and even the size of plaque.
