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Heart, Arteries & Veins Forms the Circulatory System
The heart pumps blood into
arteries. The arteries divide and
subdivide and finally end in
capillaries. The capillaries later unite
to form veins. The veins return
blood to the heart. The arteries
carry pure blood away from the
heart, Veins carry De-oxygenated
blood to the heart and the
capillaries are minute channels
receives blood from smaller arteries
Heart, Arteries & Veins Forms the Circulatory System
Blood circulation: depending on the course of blood. Circulation can be
classified into:
1. Systemic circulation.
2. Pulmonary circulation
3. Coronary circulation
4. Portal circulation.
Heart, Arteries & Veins Forms the Circulatory System
Systemic circulation:
It’s the blood circulation that carries oxygenated blood away from the heart, to
body, and returns deoxygenated blood back to the heart except for lungs. This
circulation starts Oxygenated blood enters the left atrium from the pulmonary
The blood is then pumped through the mitral valve into the left ventricle. From
left ventricle, blood is pumped through the aortic valve and into the aorta, the
body’s largest artery. The aorta arches and branches into major arteries and
breaks up into smaller arteries and finally ends in capillaries. The capillaries
form venules which join up ultimately to form 2 large venous trunks namely
vena cava and inferior vena cava. These 2 venous trunks open in the right
the heart.
Heart, Arteries & Veins Forms the Circulatory System
Gas and nutrient exchange with the tissues occurs within the capillaries that run
through the tissues. Metabolic waste and carbon dioxide diffuse out of the cell into
the blood, while oxygen and glucose in the blood diffuse out of the blood and into
the cell. The arterial component of systemic circulation the highest blood pressures
in the body. The venous component of systemic circulation has considerably lower
blood pressure in comparison, due to their distance from the heart, but contain
semi-lunar valves to compensate. Systemic circulation as a whole is a higher
pressure system than pulmonary circulation.
Heart, Arteries & Veins Forms the Circulatory System
Pulmonary circulation:
It involves the purification of blood in lungs. It’s the circulation of the blood
the heart to the lungs for oxygenation, then back to the heart again. The
depleted blood from the body leaves the systemic circulation when it enters the
right atrium, The blood is then pumped through the tricuspid valve into the
ventricle. From the right ventricle, blood is pumped through the pulmonary
and into the pulmonary artery. The pulmonary artery splits into the right and
pulmonary arteries and travel to each lung. The oxygenated blood then leaves
lungs through pulmonary veins, which returns it to the left atrium, completing
pulmonary circulation.
Heart, Arteries & Veins Forms the Circulatory System
Heart, Arteries & Veins Forms the Circulatory System
Coronary Circulation: Coronary circulation involves blood supply to the heart
itself, it is the circulation of blood in the blood vessels of the heart muscle. The
vessels that deliver oxygen-rich blood to the myocardium are known as
arteries. The right and left coronary arteries arise from ascending aorta. The
that remove the deoxygenated blood from the heart muscle are known as
veins which collect and opens into the right atrium.
Portal circulation: It’s the circulation of blood through the liver. In this
circulation, the portal vein carries blood that has circulated in stomach,
and pancreas to liver. The portal vein divides into capillaries. These capillaries
with the capillaries of the hepatic artery. The venous blood of liver is collected
hepatic vein which joins with inferior vena cava.

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Heart, Arteries _ Veins Forms the Circulatory

  • 1. Heart, Arteries & Veins Forms the Circulatory System The heart pumps blood into arteries. The arteries divide and subdivide and finally end in capillaries. The capillaries later unite to form veins. The veins return blood to the heart. The arteries carry pure blood away from the heart, Veins carry De-oxygenated blood to the heart and the capillaries are minute channels receives blood from smaller arteries
  • 2. Heart, Arteries & Veins Forms the Circulatory System Blood circulation: depending on the course of blood. Circulation can be classified into: 1. Systemic circulation. 2. Pulmonary circulation 3. Coronary circulation 4. Portal circulation.
  • 3. Heart, Arteries & Veins Forms the Circulatory System Systemic circulation: It’s the blood circulation that carries oxygenated blood away from the heart, to body, and returns deoxygenated blood back to the heart except for lungs. This circulation starts Oxygenated blood enters the left atrium from the pulmonary The blood is then pumped through the mitral valve into the left ventricle. From left ventricle, blood is pumped through the aortic valve and into the aorta, the body’s largest artery. The aorta arches and branches into major arteries and breaks up into smaller arteries and finally ends in capillaries. The capillaries form venules which join up ultimately to form 2 large venous trunks namely vena cava and inferior vena cava. These 2 venous trunks open in the right the heart.
  • 4. Heart, Arteries & Veins Forms the Circulatory System Gas and nutrient exchange with the tissues occurs within the capillaries that run through the tissues. Metabolic waste and carbon dioxide diffuse out of the cell into the blood, while oxygen and glucose in the blood diffuse out of the blood and into the cell. The arterial component of systemic circulation the highest blood pressures in the body. The venous component of systemic circulation has considerably lower blood pressure in comparison, due to their distance from the heart, but contain semi-lunar valves to compensate. Systemic circulation as a whole is a higher pressure system than pulmonary circulation.
  • 5. Heart, Arteries & Veins Forms the Circulatory System Pulmonary circulation: It involves the purification of blood in lungs. It’s the circulation of the blood the heart to the lungs for oxygenation, then back to the heart again. The depleted blood from the body leaves the systemic circulation when it enters the right atrium, The blood is then pumped through the tricuspid valve into the ventricle. From the right ventricle, blood is pumped through the pulmonary and into the pulmonary artery. The pulmonary artery splits into the right and pulmonary arteries and travel to each lung. The oxygenated blood then leaves lungs through pulmonary veins, which returns it to the left atrium, completing pulmonary circulation.
  • 6. Heart, Arteries & Veins Forms the Circulatory System
  • 7. Heart, Arteries & Veins Forms the Circulatory System Coronary Circulation: Coronary circulation involves blood supply to the heart itself, it is the circulation of blood in the blood vessels of the heart muscle. The vessels that deliver oxygen-rich blood to the myocardium are known as arteries. The right and left coronary arteries arise from ascending aorta. The that remove the deoxygenated blood from the heart muscle are known as veins which collect and opens into the right atrium. Portal circulation: It’s the circulation of blood through the liver. In this circulation, the portal vein carries blood that has circulated in stomach, and pancreas to liver. The portal vein divides into capillaries. These capillaries with the capillaries of the hepatic artery. The venous blood of liver is collected hepatic vein which joins with inferior vena cava.