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Questions and Answers
What is the primary function of pulmonary circulation?
What is the primary function of pulmonary circulation?
- To remove waste products from the body
- To distribute oxygen to the body
- To supply blood to the heart
- To circulate blood between the heart and the lungs (correct)
Which of the following describes systemic circulation?
Which of the following describes systemic circulation?
- Involves only the lungs and heart
- Involves oxygen exchange in the lungs
- Occurs between the heart and the rest of the body except for the lungs (correct)
- Supplies blood exclusively to the heart
What does coronary circulation specifically supply blood to?
What does coronary circulation specifically supply blood to?
- Only to the brain
- Lungs and heart
- Rest of the body
- Heart muscles (correct)
Which circulation is primarily responsible for oxygenation of blood?
Which circulation is primarily responsible for oxygenation of blood?
In which type of circulation does blood travel through the body tissues?
In which type of circulation does blood travel through the body tissues?
What is the primary function of the circulatory system?
What is the primary function of the circulatory system?
What is the approximate composition of plasma in the total volume of blood?
What is the approximate composition of plasma in the total volume of blood?
Which components are suspended in plasma?
Which components are suspended in plasma?
How often does blood circulate from the heart throughout the body and back?
How often does blood circulate from the heart throughout the body and back?
Which part of the circulatory system serves as the muscular pump?
Which part of the circulatory system serves as the muscular pump?
What is the primary function of arteries in the circulatory system?
What is the primary function of arteries in the circulatory system?
Which type of blood vessel is the smallest?
Which type of blood vessel is the smallest?
What do veins primarily do?
What do veins primarily do?
How many pathways does blood follow in the circulatory system?
How many pathways does blood follow in the circulatory system?
What is the role of capillaries in the circulatory system?
What is the role of capillaries in the circulatory system?
Which statement best describes the relationship between arteries and veins?
Which statement best describes the relationship between arteries and veins?
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Study Notes
Function of the Circulatory System
- Transports oxygen and nutrients to body cells.
- Carries de-oxygenated blood and carbon dioxide back to the heart and lungs.
- Consists of three major parts: heart, blood, and blood vessels.
- The heart acts as a muscular pump for blood circulation.
- Blood circulates in a closed system, remaining within blood vessels.
- A complete circulation from heart to body and back takes approximately 60 seconds.
Blood Composition
- Blood is a tissue made of fluid, cells, and cell fragments.
- Plasma, the fluid portion of blood, is straw-colored and constitutes about 56% of total blood volume.
- Red blood cells, white blood cells, and platelets are suspended in plasma.
Types of Blood Vessels
- Three main types of blood vessels: arteries, veins, and capillaries.
- Arteries: carry blood away from the heart to the body.
- Veins: transport blood back to the heart from the body.
- Comparison: arteries and veins can be likened to major highways and local streets, respectively.
- Capillaries: smallest blood vessels facilitating blood exchange with body cells.
Heart as the Vital Pump
- The heart is essential for moving blood throughout thousands of blood vessels.
- It connects the circulatory system by maintaining blood flow to and from all parts of the body.
Pathways of Circulation
- Blood follows two primary pathways: pulmonary and systemic circulation.
- Both pathways converge at the heart.
Pulmonary Circulation
- Occurs exclusively between the heart and the lungs.
- Responsible for oxygenating blood and removing carbon dioxide.
Systemic Circulation
- Circulates blood between the heart and all other body parts, excluding the lungs.
- Supplies oxygenated blood to the body's tissues.
Coronary Circulation
- Involves blood vessels that supply and drain blood to and from the heart itself.
- Ensures that the heart muscle receives adequate oxygen and nutrients for functionality.
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