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first let us see how the oxygenated
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blood and deoxygenated blood moves
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through the heart once you have that
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idea it's very easy to understand the
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structure and function of the heart and
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I will try my level best to make it as
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simple as possible so this is how the
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oxygenated blood flows through the heart
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oxygen rich blood from the
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lungs that is transferred to pulmonary
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vein then to left atrium then through
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the mitral valve it is transferred to
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ventricle then through the semilunar
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valve or iotic valve it is transferred
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Iota from Iota this oxygenated blood is
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transfer to all parts of the body where
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it unlocks oxygen and lots carbon
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dioxide if you are familiar with these
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terms it's fine otherwise please watch
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this video two to three times for better
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understanding then regarding the flow of
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d oxygenated blood oxygen pour blood
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from the body that is transferred to
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Superior and inferior
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through right atrium then via TripIt
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valve it moves into the right
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ventricle then through pulmonary valve
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it reaches left and right pulmonary
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arteries then this is transferred to
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lungs where it is oxygenated
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or it turn Lots carbon dioxide and lots
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oxygen as you see the movement of
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oxidated blood primarily occurs through
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the left side of the heart whereas the
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movement of deoxygenated blood primarily
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happens through the right side of the
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heart now let us see the function of
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each of the structures starting with
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Iota this is Iota it is the largest
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artery in the body carrying oxygenated
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blood from the left ventricle to all
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parts of the body this is how the blood
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moves from left ventricle to the Iota
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then it is transferred to different
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parts of the body this green arrow for
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oxygenated blood and this red arrow for
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de oxygenated blood the second structure
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ventricle it is one of the four chambers
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34 responsible for pumping oxygenated
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blood to the body via Iota as you see
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here the third structure is a right
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ventricle right ventricle pumps
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deoxygenated blood to the lungs via
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oxygenation so from the right ventricle
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deoxygenated blood moves into the lungs
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artery the next structure is the right
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Atria so this is the right
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receives deoxy blood from the body so
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from the deoxy blood from Superior and
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inferior vava is pumped into the right
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atrium and then that is pumped into the
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ventricle the next structure is left
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Atria so this is a left
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Atria it receives oxygenated blood from
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the lens through this pulmonary vein and
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pumps it into the left ventricle as you
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see from pulmonary vein oxidated blood
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enters left Atria then it is transferred
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ventricle next is pulmonary artery this
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artery carries de oated blood from the
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right ventricle to the lungs for
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oxin it splits into left and right
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branches that leading to each
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lung the next structure is pulmonary
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vean pulmonary vean carries oxidated
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blood from the lungs back to the atrium
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of the heart completing the circuit of
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pulmonary circulation the next structure
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veka superior vena is a large vean that
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carries deoxygenated blood as you see
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it's a large vean from the upper body
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heart neck and arms to the right atrium
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to the right atrium of the heart
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next structure is inferior vena this
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inferior vena is also a large vein that
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carries de oxinate blood from the lower
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part of parts of the body like leg
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abdomen to the right atrium to the right
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atrium of the heart the next structure
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is a valve which is called as mital
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valve it is located between this left
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atrium and this left ventricle
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flow of blood into the Atrium during
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ventricular contraction it has two
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leaflets the next valve is the TripIt
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valve so this is a trasit
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valve that is situated between the right
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atrium and right ventricle preventing
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backflow of blood into the atrium during
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ventricular contraction it has three
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floods and the final structure is the
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iotic valve and this is the iotic valve
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it is situated between left ventricle
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and Iota responsible for regulating
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blood flow from the heart into the Iota
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during contraction and preventing back
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relaxation so these are the primary
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structures and their functions of the
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heart now I think you are clear with the
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structure and functions of different
5:52
parts of a heart now let us see once
5:54
again how the oxygenated blood and
5:57
deoxygenated blood flows through the the
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heart oxygenated blood from oxygen rich
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blood from lungs moves into pulmonary
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vein pulmonary vein as you see this is
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the pulmonary vein then to the left
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Atria then it through this mital valve
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it enters the left ventricle then
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through the iotic valve it enters into
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this Iota then it is circulated to
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different parts of the
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body regarding the flow of De oxidated
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blood oxygen pour blood from the
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body is transferred to the superior vena
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and this inferior vena then it moves
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into this chamber that is right Atria
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from right atrium it is transfer to
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right ventricle through this valve that
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is called a stri aspit
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valve then there is pulmonary semilunar
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valve through that valve it is
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transferred to pulmonary artery
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then it is transferred to lungs for
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oxygenation so this is how circulation
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of blood happens through heart lungs and
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different parts of the body please watch
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two to three times for better
7:20
understanding take care stay blessed
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thank you so much you are with Biology
