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Questions and Answers
What is the primary function of the human circulatory system?
Which of the following is responsible for carrying oxygenated blood away from the heart?
What is the term for the flow of blood from the heart to the lungs to pick up oxygen and release carbon dioxide?
What is the pressure exerted on blood vessels when the heart is at rest?
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Which of the following is NOT a component of the circulatory system?
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What system regulates blood pressure?
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Study Notes
Overview
- The human circulatory system, also known as the cardiovascular system, is a network of organs and vessels that transport blood throughout the body.
- Its primary function is to supply oxygen and nutrients to tissues and organs and remove waste products.
Components
- Heart: a muscular organ that pumps blood throughout the body.
- Arteries: blood vessels that carry oxygenated blood away from the heart to the rest of the body.
- Veins: blood vessels that carry deoxygenated blood back to the heart.
- Capillaries: tiny blood vessels where oxygen and nutrients are exchanged with the body's tissues.
- Blood: a liquid tissue that transports oxygen, nutrients, and waste products throughout the body.
Blood Flow
- Pulmonary circulation: the flow of blood from the heart to the lungs to pick up oxygen and release carbon dioxide.
- Systemic circulation: the flow of blood from the heart to the rest of the body to deliver oxygen and nutrients.
- Coronary circulation: the flow of blood to the heart muscle itself.
Blood Pressure
- Systolic pressure: the pressure exerted on blood vessels when the heart beats.
- Diastolic pressure: the pressure exerted on blood vessels when the heart is at rest.
- Blood pressure regulation: controlled by the autonomic nervous system, which adjusts heart rate and blood vessel diameter to maintain a healthy blood pressure.
Functions
- Oxygen delivery: the circulatory system delivers oxygen from the lungs to the body's tissues.
- Nutrient delivery: the circulatory system delivers nutrients from the digestive system to the body's tissues.
- Waste removal: the circulatory system removes waste products from the body's tissues and transports them to the excretory organs.
- Regulation of body temperature: the circulatory system helps regulate body temperature by transporting heat from the core to the skin.
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Description
Learn about the components, functions, and processes of the human circulatory system, including blood flow, blood pressure, and oxygen delivery. Understand how the heart, arteries, veins, and capillaries work together to keep the body healthy. Test your knowledge with this quiz!
