Questions and Answers
What is the primary function of red blood cells (RBCs)?
Which component of blood is primarily responsible for immune responses?
What is the average pH range of blood?
What does blood regulate in the body?
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What is the liquid part of blood called?
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Which method is commonly used to collect blood for testing?
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Which of the following is NOT a function of blood?
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What is the viscosity of blood compared to water?
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Study Notes
Cardiovascular System Overview
- Comprises three main components: Blood, Heart, and Vessels.
- Blood acts as a liquid tissue circulating throughout the body.
- Heart is a muscular organ responsible for pumping blood.
- Vessels are tubes that transport blood to various parts of the body.
Hematology
- Focuses on blood, its formation, and associated disorders.
Blood Functions
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Transport:
- Delivers oxygen from lungs to cells.
- Carries carbon dioxide from cells to lungs for exhalation.
- Transports nutrients from the digestive system to the body's cells.
- Delivers hormones from glands to target cells.
- Moves waste products from cells to excretory organs.
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Regulation:
- Maintains body temperature by carrying heat.
- Regulates pH balance acting as a buffer.
- Controls fluid balance by absorbing and transporting water.
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Protection:
- Clots to prevent blood loss from injuries.
- White blood cells combat infections.
- Antibodies are transported to help in immune response.
Physical Characteristics of Blood
- Density: Denser than water.
- Viscosity: More viscous compared to water.
- Color: Bright red when oxygenated, dark red when deoxygenated.
- Temperature: Slightly higher than normal body temperature.
- pH: Typically ranges from 7.35 to 7.45, indicating slightly alkaline condition.
- Volume: Roughly accounts for 20% of the total fluid content in the body.
Blood Components
- Plasma: Liquid portion containing water, proteins, nutrients, waste products, and electrolytes.
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Formed Elements: Cellular components including:
- Red Blood Cells (RBCs): Primary function is to transport oxygen.
- White Blood Cells (WBCs): Essential for immune defense and infection fighting.
- Platelets: Involved in clot formation to prevent excessive bleeding.
Blood Collection Methods
- Venipuncture: Common method for blood collection using a needle and syringe; typically performed on the antecubital vein.
- Alternative Collection Sites: Blood can also be drawn from a finger or heel in certain situations.
- Arterial Puncture: Used in specific cases to assess oxygen levels or monitor blood gases, involving collection from an artery.
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Description
Test your knowledge of the cardiovascular system, including its components such as blood, heart, and vessels. Additionally, explore the field of hematology and the functions of blood in the body.
