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When travelling from legs to heart, blood travels in veins. These veins have a special structure which is adapted for this type of transport. They have valves or pocket-like flaps which prevents blood from flowing backwards or in other words, falling down.

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Q: When blood travels from your legs to your heart why doesn't it fall down?
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Does oxygen enter the blood in the heart?

maybe your question goes this way..."how does oxygen enter the blood from the lungs?"Two types of blood vessels carry blood throughout our bodies: The arteries carry oxygenated blood (blood that has received oxygen from the lungs) from the heart to the rest of the body. The blood then travels through the veins back to the heart and lungs, where it receives more oxygen.


Does the aorta flow from the heart or to the heart?

The aorta is the largest artery in your body, it starts from the left ventricle of your heart it travels to the base of your neck to a point called the aorta arch where at its peak it splits into three more arteries the first the brachiocephalic artery then he left CCA (Common carotid artery,) then the left subclavian artery . The aorta after spliting into three travels down your body where it splits into the femoral arteries that supply the legs and then split further into the popliteal and lastly the dorsal pedis. Hope this is what you are looking for and to make it clear the aorta does not moves i was using the term travels to explain the journey of the oxygenated blood .


How is blood transported from the heart and to it?

The coronary arteries transport blood from the aorta to the heart muscles. They are called this because they look like an upside down crown.


Where does the artery carry blood to?

The aorta receives blood directly from the left ventricle of the heart.


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.

Related questions

How does blood from the face get back to the heart?

It travels through the Jugular Vein into the Superior Vena Cava down the neck and into the heart.


Why does the heart pump blood around pour body?

Our heart pumps blood around our body because... when we breath in oxygen it travels down our windpipe and into our lungs where it flows into our blood stream which the heart pumps round and to our muscles with are supplied with the oxygen which it needs to keep going! few, its a long story!


How fast does blood travel?

Blood travels at three feet per second when it leaves the heart, but it slows down as it reaches smaller arteries and capillaries. Blood takes one minute to travel through the body.


How does blood travel around your body?

Blood travels around your body via Veins and comes out via Arteries i remember it by veIN


Does oxygen enter the blood in the heart?

maybe your question goes this way..."how does oxygen enter the blood from the lungs?"Two types of blood vessels carry blood throughout our bodies: The arteries carry oxygenated blood (blood that has received oxygen from the lungs) from the heart to the rest of the body. The blood then travels through the veins back to the heart and lungs, where it receives more oxygen.


Grouping of nerves that bring electrical impule down from the top half of the heart to the lower half of the heart?

The electrical impulse travels down bundles of His fibres, then down to the PURKINJE fibres.


How do veins carry blood cells through your body?

The body will use gravity and use other things such asmuscles to push the blood up or down. Your veins expand and contract to push the blood farther down the vein's Also your heart will beat pushing the blood out and down your vein's It will also suck the blood in the heart causing your veins to push up the blood. The heart will clean the blood befor it goes back in to the heart.


How does gravity affect your blood?

Gravity slows down the return of blood to the heart.


What does the left side and right side of the heart do?

The 'right' side of the heart pumps deoxygenated blood out of the pulmonary artory to the lung capillaries to be oxygenated, which then after oxygenation travels down the pulmonary vein into the 'left' atrium to be pumped through the entire body via the aorta.


What does the right side and left side of the heart do?

The 'right' side of the heart pumps deoxygenated blood out of the pulmonary artory to the lung capillaries to be oxygenated, which then after oxygenation travels down the pulmonary vein into the 'left' atrium to be pumped through the entire body via the aorta.


Does sleeping upside down affect heart?

no it effects your blood because if you sleep upside down blood comes down to your brain.


What happens in heart?

In heart has a four valve the two valve is pump the up and the others valve pump the blood down. heart is pump the blood