Podcast
Questions and Answers
What is the primary function of the heart in the circulatory system?
What is the primary function of the heart in the circulatory system?
- To regulate body temperature
- To filter toxins from the blood
- To produce red blood cells
- To pump blood throughout the body (correct)
Which part of the heart is responsible for supplying the heart muscle with oxygen and nutrients?
Which part of the heart is responsible for supplying the heart muscle with oxygen and nutrients?
- Coronary veins
- Pulmonary arteries
- Aorta
- Coronary arteries (correct)
What are the walls of the heart primarily made of?
What are the walls of the heart primarily made of?
- Connective tissue
- Smooth muscle
- Epithelial tissue
- Cardiac muscle (correct)
What do coronary veins transport away from the heart muscle?
What do coronary veins transport away from the heart muscle?
Which component is NOT part of the circulatory system?
Which component is NOT part of the circulatory system?
What is the function of the heart valves?
What is the function of the heart valves?
Which term describes the phase where the ventricles contract and pump blood to the arteries?
Which term describes the phase where the ventricles contract and pump blood to the arteries?
Which veins carry oxygenated blood back to the heart?
Which veins carry oxygenated blood back to the heart?
What is the primary role of capillaries in the circulatory system?
What is the primary role of capillaries in the circulatory system?
What occurs during the general diastole phase of the cardiac cycle?
What occurs during the general diastole phase of the cardiac cycle?
The term 'myocardium' refers to which part of the heart?
The term 'myocardium' refers to which part of the heart?
Which component of the heart prevents backflow of blood from the ventricles into the atria?
Which component of the heart prevents backflow of blood from the ventricles into the atria?
Which part of the ECG corresponds to auricular systole?
Which part of the ECG corresponds to auricular systole?
Which of the following structures is part of the pulmonary circulation?
Which of the following structures is part of the pulmonary circulation?
What characterizes the blood carried by the pulmonary artery?
What characterizes the blood carried by the pulmonary artery?
What is the primary delivery role of coronary arteries?
What is the primary delivery role of coronary arteries?
What type of blood vessel has thick walls and carries blood away from the heart?
What type of blood vessel has thick walls and carries blood away from the heart?
What happens during auricular systole?
What happens during auricular systole?
Flashcards
What is the main function of the heart?
What is the main function of the heart?
The heart is a vital organ responsible for pumping blood throughout the body, delivering oxygen and nutrients. This continuous movement of blood is called blood circulation.
What kind of muscle makes up the heart?
What kind of muscle makes up the heart?
The heart is a hollow, muscular organ. Its walls are made up of cardiac muscle known as myocardium.
What's the purpose of the circulatory system?
What's the purpose of the circulatory system?
The circulatory system is responsible for transporting blood, containing vital oxygen and essential nutrients, throughout the body.
How does the heart get its own oxygen and nutrients?
How does the heart get its own oxygen and nutrients?
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What is blood's main job?
What is blood's main job?
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Superior vena cava
Superior vena cava
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Inferior vena cava
Inferior vena cava
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Aorta
Aorta
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Pulmonary artery
Pulmonary artery
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Pulmonary veins
Pulmonary veins
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Right auricle
Right auricle
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Left auricle
Left auricle
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Tricuspid valve
Tricuspid valve
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Bicuspid valve (mitral valve)
Bicuspid valve (mitral valve)
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Right ventricle
Right ventricle
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Left ventricle
Left ventricle
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Septum
Septum
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Closed circulatory system
Closed circulatory system
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Pulmonary circulation
Pulmonary circulation
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Systemic circulation
Systemic circulation
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Study Notes
Circulatory System Objectives
- Explain blood circulation
- Recognize the structure of the heart
- Recognize cardiac activity
- Recognize cardiovascular disease
Parts of the Circulatory System
- The circulatory system includes the heart, blood vessels, and blood.
- Blood vessels consist of arteries, capillaries, and veins.
- Blood is composed of plasma and blood cells.
Heart
- The heart is a hollow muscular organ that pumps blood throughout the body.
- The walls of the heart are made of cardiac muscle, known as myocardium.
- Coronary arteries supply the heart with oxygen and nutrients.
- Veins transport carbon dioxide and waste away from the heart.
Longitudinal Section of a Mammal's Heart
- The heart contains structures like the superior vena cava, pulmonary artery, right and left atria, tricuspid valve, right ventricle, left ventricle, aortic valve, and pulmonary valve.
Cardiac Cycle
- The cardiac cycle involves the rhythmic contraction and relaxation of the heart muscle.
- The cycle includes phases like atrial systole (0.1 seconds), ventricular systole (0.3 seconds), and general diastole(0.4 seconds).
- Atrial systole refers to the contraction of the atria, pushing blood into the ventricles.
- Ventricular systole refers to the contraction of the ventricles, forcing blood out of the heart into the arteries
- General diastole refers to the relaxation of the entire heart.
Heart Valves
- Heart valves ensure one-way flow of blood.
- Tricuspid, Bicuspid, and Sigmoid valves prevent backflow.
- During different phases of the cardiac cycle, different valves open and close to ensure unidirectional blood flow.
Blood Circulation
- Blood circulation is a closed system.
- It involves pulmonary circulation, where blood circulates between the heart and lungs.
- Systemic circulation, where blood circulates between the heart and the rest of the body.
Blood Vessels
- Arteries carry oxygenated blood away from the heart.
- Veins carry deoxygenated blood towards the heart.
- Capillaries are thin-walled vessels for gas exchange between blood and tissues.
- Arterioles and venules connect arteries and veins to capillaries, respectively.
- Artery walls are thick, veins have thin walls and valves, capillaries have very thin walls.
Cardiovascular Accident (CVA)
- It affects the heart's ability to supply blood to certain organs like the heart and brain.
- Coronary arteries deliver oxygenated blood and nutrients to the heart muscle.
Myocardial Infarction (MI)
- A cardiovascular accident, resulting from poor blood supply to the heart muscle.
- Risk factors include diet rich in lipids and carbohydrates, obesity, stress, sedentary lifestyle, age, smoking, alcohol, and diabetes.
- Diagnosis involves angiography, a medical imaging technique to visualize the insides of blood vessels.
Myocardial Infarction Treatment
- Angioplasty is a technique used to mechanically widen narrowed or obstructed arteries.
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