❤❤❤ Circulatory System

Tuesday, November 09, 2021 2:41:45 PM

Circulatory System



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The Heart and Circulatory System - How They Work

One: Type "O". Two: white cells and red cells. Three: white cells, red cells, and plasma. The lungs. The heart. The kidneys. The blood vessels and capillaries. Crossword Puzzle on "The Circulatory System". Circulatory System What is the circulatory system? The body's breathing system The body's system of nerves The body's food-processing system The body's blood-transporting system From what source do cells get their food? Blood Oxygen Other cells Carbon dioxide Why is oxygen important to blood and to the cells? Oxygen is not important -- carbon dioxide is the most important substance to the body.

At each body part, a network of tiny blood vessels called capillaries connects the very small artery branches to very small veins. The capillaries have very thin walls, and through them, nutrients and oxygen are delivered to the cells. Waste products are brought into the capillaries. Capillaries then lead into small veins. Small veins lead to larger and larger veins as the blood approaches the heart. Valves in the veins keep blood flowing in the correct direction. Two large veins that lead into the heart are the superior vena cava and inferior vena cava. The terms superior and inferior don't mean that one vein is better than the other, but that they're located above and below the heart. Once the blood is back in the heart, it needs to re-enter the pulmonary circulation and go back to the lungs to drop off the carbon dioxide and pick up more oxygen.

How Does the Heart Beat? This is when the ventricles contract and pump blood into the aorta and pulmonary artery. During systole, the atrioventricular valves close, creating the first sound the lub of a heartbeat. When the atrioventricular valves close, it keeps the blood from going back up into the atria. During this time, the aortic and pulmonary valves are open to allow blood into the aorta and pulmonary artery. When the ventricles finish contracting, the aortic and pulmonary valves close to prevent blood from flowing back into the ventricles.

These valves closing is what creates the second sound the dub of a heartbeat. The second phase is called diastole die-AS-tuh-lee. This is when the atrioventricular valves open and the ventricles relax. This allows the ventricles to fill with blood from the atria, and get ready for the next heartbeat. To help keep your child's heart healthy: Encourage plenty of exercise. Offer a nutritious diet. Help your child reach and keep a healthy weight. Go for regular medical checkups. Tell the doctor about any family history of heart problems. Review the cardiac veins and test your knowledge. Review how the atrioventricular and semilunar valves open and close in a full cardiac cycle in this interactive tutorial.

Review the four chambers of the heart as well as other features in this interactive tutorial and test yourself in the quiz. The major blood vessels of the heart consist of large arteries and veins that transport blood to and from the different circulatory systems of the body. The four heart valves open and close in response to pressure changes that occur in the ventricles. Review the movement of the valves in this tutorial.

Circulatory System page was last modified on 16 July Circulatory System, at Circulatory System The Circulatory System system performs a number of Oedipus And Hercules Relationship functions in Circulatory System body. How Does Blood Clot? Circulatory System infarction MI — Circulatory System know we Circulatory System talking about heart muscle, right, myocardial?

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