Questions and Answers
Another name for the circulatory system is the ____________
cardiovascular
The main organ in the circulatory system is the _______________
heart
The heart is about the size of your ___________
fist
The kind of muscle your heart is made of is ___________
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The heart's two upper chambers are called _________
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The heart's two lower chambers are called __________
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Blood vessels leading to and from the lungs are called ______________
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Blood vessels leading away from the heart are called ______________
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Tiny, narrow blood vessels are called ___________
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The group of cells that send electric signals to contract the heart is called the ___________
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The largest artery in the body is called the _____________
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The blood cells that carry oxygen to your cells are the ____________
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Blood types A, B, AB, and O are determined by ___________
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Blood clotting and scabs are the result of _________
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The following ______________ fights disease.
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The blood cells that contain nuclei are __________
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The blood cells that only live about 120 days are ___________
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The blood cells that can live for months or even years are ______________
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Red and white blood cells are produced by the bone ____________
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Blood is red when it is carrying the ________ element.
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Bonus: The liquid part of the blood, 90% water, is called ____________
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Now take your pulse for 30 seconds. What is your heart rate for one minute?
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Study Notes
Circulatory System Overview
- The circulatory system is also known as the cardiovascular system.
- The heart is the primary organ responsible for pumping blood throughout the body.
- It is approximately the size of a person's fist.
Heart Structure
- The heart is composed of cardiac muscle tissue.
- It features two upper chambers, called atria, which receive blood.
- The heart has two lower chambers, known as ventricles, which pump blood out of the heart.
Blood Vessel Types
- Arteries carry blood away from the heart, delivering oxygen-rich blood to the body's tissues.
- Veins return blood to the heart, usually carrying deoxygenated blood back from the body.
- Capillaries are tiny, narrow blood vessels that facilitate the exchange of oxygen, carbon dioxide, and other substances between blood and tissues.
Electrical System of the Heart
- The pacemaker cells are responsible for generating electrical signals that trigger heart contractions, regulating the heartbeat.
Blood Composition and Function
- The aorta is the largest artery in the human body, supplying oxygenated blood to the circulatory system.
- Red blood cells transport oxygen from the lungs to all body cells.
- Blood types (A, B, AB, and O) are determined by specific marker molecules present on the surface of red blood cells.
Blood Cell Types
- Platelets play a crucial role in blood clotting, forming scabs and preventing excessive bleeding.
- White blood cells are essential for the immune response, aiding in the defense against pathogens.
- White blood cells are the only blood cells that contain nuclei, allowing them to function in immune response and long-term protection.
- Red blood cells have a lifespan of about 120 days, while white blood cells can live for months or even years.
Blood Production and Composition
- Bone marrow is the site where both red and white blood cells are produced.
- Oxygen content gives blood its red color when it is oxygenated.
- Plasma, the liquid component of blood, consists of about 90% water and carries nutrients, hormones, and waste products throughout the body.
Heart Rate Measurement
- Pulse can be measured over 30 seconds and multiplied to find the heart rate for one minute.
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Description
Test your knowledge about the circulatory system, including the structure and function of the heart, the types of blood vessels, and the electrical system regulating heartbeats. This quiz covers essential concepts and details vital to understanding how the cardiovascular system operates.
