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Questions and Answers
What is the primary role of capillaries within the circulatory system?
What is the primary role of capillaries within the circulatory system?
- To facilitate the exchange of nutrients and waste between blood and tissues. (correct)
- To carry deoxygenated blood back to the heart for re-oxygenation.
- To transport oxygenated blood directly from the heart to major organs.
- To regulate blood pressure by constricting or dilating as needed.
Which statement accurately describes the function of arteries and veins in the circulatory system?
Which statement accurately describes the function of arteries and veins in the circulatory system?
- Arteries and veins both carry a mix of oxygenated and deoxygenated blood throughout the body.
- Arteries and veins alternate in carrying oxygenated and deoxygenated blood depending on the body's activity level.
- Arteries typically carry oxygenated blood away from the heart, and veins usually carry deoxygenated blood back to the heart. (correct)
- Arteries always carry deoxygenated blood away from the heart, while veins carry oxygenated blood back to the heart.
What is the role of the circulatory system in maintaining homeostasis?
What is the role of the circulatory system in maintaining homeostasis?
- It helps stabilise body temperature and pH levels. (correct)
- It exclusively regulates the body's respiratory functions.
- It primarily functions in the digestion and absorption of nutrients.
- It solely focuses on transporting blood throughout the body.
If a blood clot were to block the flow of blood through capillaries in a tissue, what immediate effect would this likely have on the cells in that tissue?
If a blood clot were to block the flow of blood through capillaries in a tissue, what immediate effect would this likely have on the cells in that tissue?
Which of these is NOT a main component of the circulatory system?
Which of these is NOT a main component of the circulatory system?
Flashcards
Circulatory System
Circulatory System
An organ system that transports substances to and from cells, and helps stabilize body temperature and pH.
Capillaries
Capillaries
Blood components move from arteries to veins via these thin and numerous vessels.
Veins
Veins
Vessels that carry deoxygenated blood back to the heart (except for pulmonary and portal veins).
Arteries
Arteries
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Study Notes
- The circulatory system, also known as the cardiovascular system, transports substances to and from cells.
- It aids in stabilizing body temperature and pH, contributing to homeostasis.
- The main components include the heart, blood, and blood vessels.
- Arteries transport oxygenated blood to tissues, with the exception of pulmonary arteries.
- Veins carry deoxygenated blood back to the heart, except for pulmonary and portal veins.
- Capillaries facilitate blood passage from arteries to veins and are the thinnest and most abundant blood vessels.
- Capillaries connect tissues with arterioles, enabling nutrient transportation to cells.
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