To futher clarify the circulation of blood I am going to discuss the Hepatic Portal Vein System. The Hepatic Portal Vein is comprised of the Inferior Mesenteric Vein which joins the Splenic Vein to become one and then the Superior Mesenteric Vein joins the other two and one Vein Vessel is the end result, called the Hepatic Veins. Once combined the Hepatic Vein enters into the liver and then to the Ingeriro Phrenic Veins to the inferior vena cava.
Branches of the Inferior Vena Cava from the bottom to the return to the Vena Cava include
1 Right and Left Common Iliac Veins to 2. the Right and Left Lumbar Veins to the 3. Right and Left Conadal Veins to the 4. Right and Left Middle adrenal veins to the 5. Right and Left Renal Veins to the 6 Where the Right and Left Hepatic veins enter into the liver and then to the 7. Ingerior Phrenic which drains into the Inferior Vena Cava.
Wednesday, April 22, 2009
Blood Circulation of the Heart (Coronary Circuit)
To continue to study and clarify things for me I am now going to run through blood circulation of the Coronoary Circuit. First, I will discuss the Coronary Circuit (arteries).
Coming off of the Aorta is the right coronary artery which then turns into/divides into the Right Marginal Artery and the Posterior Interventricular Artery. The Left Coronary Artery turns into/divides into the anterior Interventricular artery and the circumflex artery.
The returning blood from the heart comes from the Great Cardiac Vein, the Middle Cardiac Vein and the Small/lesser Cardiac Vein. These all drain into the coronary sinus located on the back of ther heart and then the deoxygenated blood is returned to the right atrium.
Coming off of the Aorta is the right coronary artery which then turns into/divides into the Right Marginal Artery and the Posterior Interventricular Artery. The Left Coronary Artery turns into/divides into the anterior Interventricular artery and the circumflex artery.
The returning blood from the heart comes from the Great Cardiac Vein, the Middle Cardiac Vein and the Small/lesser Cardiac Vein. These all drain into the coronary sinus located on the back of ther heart and then the deoxygenated blood is returned to the right atrium.
Fetal Circulation
To help prepare for my exam I am going to discuss Fetal Circulation to make sure I have it right
Fetal Circulation
Blood from the placenta leaves the placenta in a cord composed of 2 arteries and vein, the vein carries oxygen to the baby. Through the cord the blood enters the baby below the liver, the blood then enters the liver where it is cleansed, filtered and moved to the heart, where it enters at the Right Atrium. From the right atrium there are two pathways that the blood can take. 1. From the right atrium to the left atrium through the interatrial septum which is located at the foramen ovale. Then from here it enters into the left ventricles and sent through the lungs. 2 The blood enters the right atrium to the right ventricle to the pulmonary SL valve to the pulmonary trunk to the pulmonary artery to the Right and left lungs. At the pulmonary artery it overlaps the aortic arch and there is a whole that allows blood to come in and it is circulated to the rest of the body.
When the blod enters the baby it is fully oxygenated after it passes through the liver it is partially oxygenated. The majority of the blood that travels through the baby is deoxygenated.
Fetal Circulation
Blood from the placenta leaves the placenta in a cord composed of 2 arteries and vein, the vein carries oxygen to the baby. Through the cord the blood enters the baby below the liver, the blood then enters the liver where it is cleansed, filtered and moved to the heart, where it enters at the Right Atrium. From the right atrium there are two pathways that the blood can take. 1. From the right atrium to the left atrium through the interatrial septum which is located at the foramen ovale. Then from here it enters into the left ventricles and sent through the lungs. 2 The blood enters the right atrium to the right ventricle to the pulmonary SL valve to the pulmonary trunk to the pulmonary artery to the Right and left lungs. At the pulmonary artery it overlaps the aortic arch and there is a whole that allows blood to come in and it is circulated to the rest of the body.
When the blod enters the baby it is fully oxygenated after it passes through the liver it is partially oxygenated. The majority of the blood that travels through the baby is deoxygenated.
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