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Questions and Answers
What is the primary function of cardiomyocytes?
What is the primary function of cardiomyocytes?
- To pump blood rhythmically and involuntarily. (correct)
- To enable voluntary movement of limbs.
- To transport oxygen throughout the body.
- To connect veins to capillaries.
Which statement about arteries is accurate?
Which statement about arteries is accurate?
- They carry deoxygenated blood back to the heart.
- Their walls are thinner than veins.
- They have no elastic properties.
- They carry blood away from the heart. (correct)
What distinguishes veins from arteries?
What distinguishes veins from arteries?
- Veins have thinner walls and contain valves to prevent backflow. (correct)
- Veins are responsible for transporting blood under high pressure.
- Veins transport oxygen-rich blood only.
- Veins have thicker walls and no valves.
What role do capillaries play in the circulatory system?
What role do capillaries play in the circulatory system?
How do arterioles contribute to the circulatory system?
How do arterioles contribute to the circulatory system?
Flashcards
Aorta
Aorta
The main artery in the systemic circulation, responsible for carrying oxygenated blood away from the heart to the body.
Capillaries
Capillaries
Tiny blood vessels that connect arterioles to venules, where oxygen, nutrients, and waste exchange occurs.
Veins
Veins
Blood vessels that carry deoxygenated blood back to the heart.
Cardiomyocytes
Cardiomyocytes
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Electrocardiogram (ECG)
Electrocardiogram (ECG)
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Study Notes
Cardiac Muscle Function
- Cardiomyocytes are the muscle cells in the heart
- They contract rhythmically and involuntarily, unlike skeletal muscle
- Electric impulses are produced by the heart
- Impulses can be observed as an electrocardiogram (ECG)
Blood Vessel Structure and Function
- Arteries carry blood away from the heart
- The aorta is the main artery in the systemic circulation
- Arterial walls are thick and elastic, helping to smooth out pressure changes
- Arterioles are smaller branches of arteries, with more muscle tissue in their walls to regulate blood flow
- Capillaries are narrow vessels, allowing for the exchange of nutrients, waste, and oxygen with tissues
- Venules are small veins, connecting to minor veins
- Veins carry blood back to the heart, with thinner walls than arteries and valves to prevent backflow
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