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Questions and Answers
What is the cardiovascular system?
What is the cardiovascular system?
The cardiovascular system is a vital process that circulates blood to maintain homeostasis in the body.
Which components make up the cardiovascular system?
Which components make up the cardiovascular system?
Hematology is the study of blood and its disorders.
Hematology is the study of blood and its disorders.
True
Blood contributes to homeostasis by transporting _____ and _____ to and from the body's cells.
Blood contributes to homeostasis by transporting _____ and _____ to and from the body's cells.
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What are the three general functions of blood?
What are the three general functions of blood?
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What percentage of whole blood is formed elements?
What percentage of whole blood is formed elements?
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What is blood plasma?
What is blood plasma?
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White blood cells are more than 99% of the formed elements in blood.
White blood cells are more than 99% of the formed elements in blood.
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Study Notes
Cardiovascular System
- The cardiovascular system is also known as the circulatory or vascular system.
- It is crucial for maintaining homeostasis by circulating blood throughout the body.
- The system consists of three interconnected parts: blood, the heart, and blood vessels.
Blood
- Blood plays a vital role in homeostasis by transporting oxygen, carbon dioxide, nutrients, and hormones.
- It regulates pH and body temperature.
- It provides protection against disease through phagocytosis and antibody production.
Functions of blood
- Blood performs three primary functions: transportation, regulation, and protection.
- Transportation includes delivering oxygen to cells, removing carbon dioxide, carrying nutrients from the gastrointestinal tract, transporting hormones, and moving heat and waste products.
- Regulation involves maintaining fluid balance, pH regulation through buffering, and influencing body temperature through water content and blood flow.
- Protection is provided through clotting to prevent excessive blood loss, and white blood cells protect against disease through phagocytosis.
Components of blood
- Whole blood is composed of two main components: blood plasma and formed elements.
- Blood plasma is a watery extracellular matrix containing dissolved substances.
- Formed elements are cells and cell fragments.
- When centrifuged, blood separates into formed elements at the bottom and plasma on top.
- Formed elements are approximately 45% of whole blood, with red blood cells (RBCs) comprising over 99%.
- White blood cells (WBCs) and platelets make up less than 1% of the formed elements.
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Description
Explore the essential components and functions of the cardiovascular system, including blood, the heart, and blood vessels. Understand how blood circulates throughout the body and its role in maintaining homeostasis, transporting nutrients, and protecting against diseases.
