Podcast
Questions and Answers
What is the primary function of the circulatory system?
What is the primary function of the circulatory system?
Blood is a type of epithelial tissue.
Blood is a type of epithelial tissue.
False
What type of tissue lines the blood vessels and the heart?
What type of tissue lines the blood vessels and the heart?
epithelial tissue
The heart is a large __________.
The heart is a large __________.
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Which blood component is responsible for transporting oxygen?
Which blood component is responsible for transporting oxygen?
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Match the following components of blood with their functions:
Match the following components of blood with their functions:
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Platelets make up __________ of your blood volume.
Platelets make up __________ of your blood volume.
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The heart has nerve tissue connected to it that stimulates contraction.
The heart has nerve tissue connected to it that stimulates contraction.
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Name one waste product that blood transports out of the body.
Name one waste product that blood transports out of the body.
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What percentage of your blood is made up of white blood cells?
What percentage of your blood is made up of white blood cells?
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Study Notes
The Circulatory System
- The circulatory system is the organ system responsible for transporting substances throughout the body.
- The circulatory system comprises blood, the heart, and blood vessels.
- The circulatory system contains four types of tissue: connective, epithelial, cardiac muscle, and nerve tissue.
- Blood vessels include arteries, veins, and capillaries.
- Arteries carry blood away from the heart under high pressure.
- The walls of arteries are thick and muscular to withstand this pressure.
- Veins carry blood toward the heart.
- Capillaries are small blood vessels with very thin walls allowing for material exchange. Blood cells pass through one cell at a time.
- Blood is a connective tissue that circulates throughout the body.
- Blood transports oxygen, nutrients, heat energy, carbon dioxide, hormones, and waste.
- Blood is made up of:
- Red blood cells (45% of blood): contain hemoglobin with 4 sites for oxygen and carbon dioxide attachment. Oxygen is transported from the lungs to tissues, and carbon dioxide is transported from tissues to the lungs.
- White blood cells (1% of blood): include macrophages that can "eat" infections, and lymphocytes that produce antibodies that can attach to and destroy infections.
- Platelets (<1% of blood): Essential for blood clotting.
- Plasma (55% of blood): the liquid portion of blood, rich in protein, controls blood volume and blood pressure and carries dissolved minerals, nutrients, and wastes.
- The heart contains cardiac muscle tissue, nerve tissue, and connective tissue.
- The heart is divided into four chambers: right and left atria, right and left ventricles.
- Blood flows from the body, to the heart, to the lungs, and back to the body.
- The heart pumps blood throughout the body in a continuous cycle.
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Description
Test your knowledge about the circulatory system, including its components like the heart, blood, and blood vessels. This quiz covers the functions of arteries, veins, and capillaries as well as the role of blood in transporting essential substances throughout the body.
