Blood Flow through the Heart in 2 MINUTES

Veins are blood vessels containing blood flowing to the heart.

While arteries have blood flowing from the heart.

The blue is representative of blood vessels containing

deoxygenated blood,

while the red blood vessels have oxygenated blood fresh from the

lungs. Now, let's follow the path of the blood through the

heart. The superior vena-cava receives blood from

the head, neck, upper limbs and chest.

Meanwhile, the inferior vena-cava receives blood

from the trunk, viscera, and lower limbs.

both superior and inferior vena-cava

end up in the right atrium, one of the four chambers of the heart.

The heart not only has four chambers, it also has four

valves. The purpose of the valves is to keep

blood moving in the right direction and not flow backwards.

Blood exits the right atrium through the tricuspid valve

so called because it has three flaps, and

enters the right ventricle. the blood exits the

right ventricle through the pulmonary valve and enters the

pulmonary artery. Again, it is an artery because

blood is flowing away from the heart, but it is blue because

it lacks oxygen.

The pulmonary artery then splits into the left and right

pulmonary arteries, which go to each respective lung.

In the lungs, gas exchange occurs.

The blood discards carbon dioxide and picks up oxygen.

Now, blood comes back from the lungs through the pulmonary veins,

entering the left atrium. Next, the blood is pumped into the left

into the left ventricle through the mitral, or bicuspid valve.

finally, the oxygenated blood leaves the left ventricle

through the aortic semi-lunar valve, entering the

aortic arch.

the aorta, which is the largest of all the arteries, distributes the

oxygenated blood to the rest of the body. The aortic

arch has three major branches, which supply

the head and arms with blood. Then, the aorta

curls downward from behind the heart, forming the descending aorta,

which descends through the chest and continues down through the abdomen.

In the abdomen, the descending aorta splits to supply the pelvis

and legs with blood.

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