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Questions and Answers
What is the function of the circulatory system?
What is the function of the circulatory system?
The circulatory system processes nutrients from digestion and respiration, manages cellular metabolism waste, and transports these substances to the respiratory and digestive systems for elimination.
What is the role of the arterial network?
What is the role of the arterial network?
The arterial network is a collection of blood vessels (arteries and arterioles) that carry blood from the heart to organs and tissues.
What is the role of the venous network?
What is the role of the venous network?
The venous network is a collection of blood vessels (veins and venules) that return blood from organs and tissues to the heart.
What is the function of the myocardium?
What is the function of the myocardium?
What is the function of the atria?
What is the function of the atria?
What is the function of the ventricles?
What is the function of the ventricles?
What is the role of the aorta?
What is the role of the aorta?
What is the role of the vena cava?
What is the role of the vena cava?
What is the role of the pulmonary artery?
What is the role of the pulmonary artery?
What is the role of the pulmonary veins?
What is the role of the pulmonary veins?
What is the role of the coronary vessels?
What is the role of the coronary vessels?
What happens to the volume of the ventricles during cardiac contraction (systole)?
What happens to the volume of the ventricles during cardiac contraction (systole)?
During cardiac contraction (systole), pressure is lower in the ventricles than in the arteries.
During cardiac contraction (systole), pressure is lower in the ventricles than in the arteries.
During cardiac contraction (systole), how does blood move?
During cardiac contraction (systole), how does blood move?
What happens to the volume of the ventricles during cardiac relaxation (diastole)?
What happens to the volume of the ventricles during cardiac relaxation (diastole)?
What happens to the pressure during cardiac relaxation (diastole)?
What happens to the pressure during cardiac relaxation (diastole)?
During cardiac relaxation (diastole), pressure is higher in the ventricles than in the atria.
During cardiac relaxation (diastole), pressure is higher in the ventricles than in the atria.
During cardiac relaxation (diastole), how does blood move?
During cardiac relaxation (diastole), how does blood move?
In the systemic circulation, where does the oxygen-rich blood from the pulmonary veins go?
In the systemic circulation, where does the oxygen-rich blood from the pulmonary veins go?
In the systemic circulation, what does the left ventricle do?
In the systemic circulation, what does the left ventricle do?
In the systemic circulation, where is the oxygenated blood directed?
In the systemic circulation, where is the oxygenated blood directed?
In the capillaries, what do red blood cells do?
In the capillaries, what do red blood cells do?
In the systemic circulation, where is the blood that is now low in oxygen and high in carbon dioxide returned?
In the systemic circulation, where is the blood that is now low in oxygen and high in carbon dioxide returned?
Where does the O2-poor blood that is rich in CO2 go in the pulmonary circulation?
Where does the O2-poor blood that is rich in CO2 go in the pulmonary circulation?
In the pulmonary circulation, what does the right ventricle do?
In the pulmonary circulation, what does the right ventricle do?
Where is the blood directed in the pulmonary circulation?
Where is the blood directed in the pulmonary circulation?
What happens to the blood in the capillaries of the pulmonary circulation?
What happens to the blood in the capillaries of the pulmonary circulation?
Where is the blood that is now rich in O2 and has been returned by the venules and pulmonary veins directed?
Where is the blood that is now rich in O2 and has been returned by the venules and pulmonary veins directed?
Flashcards
Système Circulatoire Function
Système Circulatoire Function
Nutrients from digestion and respiration are transported, cellular waste is removed.
Réseau Artériel
Réseau Artériel
Blood vessels (arteries and arterioles) that carry blood from the heart to organs and tissues.
Réseau Veineux
Réseau Veineux
Blood vessels (veins and venules) that bring blood from organs and tissues back to the heart.
Myocarde
Myocarde
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Oreillettes (Atria)
Oreillettes (Atria)
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Ventricules (Ventricles)
Ventricules (Ventricles)
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Aorte (Aorta)
Aorte (Aorta)
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Veines Caves (Vena Cavae)
Veines Caves (Vena Cavae)
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Artère Pulmonaire (Pulmonary Artery)
Artère Pulmonaire (Pulmonary Artery)
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Contraction Cardiaque (Systole)
Contraction Cardiaque (Systole)
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Study Notes
- Nutrients from digestion and respiration are taken up by the circulatory system.
- The circulatory system interacts with cellular metabolism, which produces waste.
- Waste then re-enters the circulatory system for removal via the respiratory and digestive systems.
Circulatory System Components
- Arterial network: System of blood vessels (arteries and arterioles) carries blood from the heart to organs and tissues.
- Venous network: System of blood vessels (veins and venules) returns blood from organs and tissues back to the heart.
Heart Components and Functions
- Myocardium: Cardiac muscle tissue.
- Atria: Small chambers collect blood from the veins.
- Ventricles: Chambers pump blood into the arteries.
- Aorta: Main artery exits from the left ventricle and distributes oxygenated blood.
- Venae cavae: Main veins return blood rich in CO2 from the body to the right atrium.
- Pulmonary artery: Main artery exits the right ventricle and carries blood rich in CO2 to the lungs.
- Pulmonary veins: Main veins return oxygenated blood from the lungs to the left atrium.
- Coronary vessels: Arteries and veins surround the cardiac muscle, providing nourishment to the heart.
Blood Circulation
- Systole (cardiac contraction): Ventricular volume decreases and pressure increases in the ventricles relative to the arteries.
- This pressure difference drives blood from the ventricles into the arteries.
- Diastole (cardiac relaxation): Ventricular volume increases and pressure decreases.
- Pressure in the ventricles drops below that of the atria, causing blood to flow from the atria into the ventricles.
Systemic Circulation
- Oxygenated blood returning from the lungs via the pulmonary veins flows from the left atrium to the left ventricle.
- The left ventricle contracts and propels blood into the aorta.
- Oxygenated blood is distributed to the body's organs and tissues through the arterial network.
- In capillaries, red blood cells deliver oxygen and collect carbon dioxide produced by cellular respiration.
- Deoxygenated blood, now rich in carbon dioxide, returns to the right atrium via the venous network, initiating pulmonary circulation.
Pulmonary Circulation
- Deoxygenated blood, rich in CO2, returns via the vena cava to the right atrium, then passes to the right ventricle.
- The right ventricle contracts, sending the blood into the pulmonary artery.
- Blood flows to the lungs via the left and right pulmonary arteries.
- In the capillaries surrounding the alveoli, red blood cells release CO2 and pick up oxygen.
- Oxygenated blood returns to the left atrium via the venules and pulmonary veins, ready for systemic circulation.
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