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Questions and Answers
What is the composition of blood?
What is the composition of blood?
- Plasma (50%) Free cells (50%)
- Plasma (60%) Free cells (40%)
- Plasma (45%) Free cells (55%)
- Plasma (55%) Free cells (45%) (correct)
Where is blood formed?
Where is blood formed?
- In the liver
- In bone marrow (correct)
- In the spleen
- In the kidneys
What is the normal count of white blood cells (WBCs) per mmᶟ?
What is the normal count of white blood cells (WBCs) per mmᶟ?
- 2000 – 6000
- 1000 – 5000
- 4000 – 10,000 (correct)
- 10,000 – 15,000
What is the normal count of platelets per mmᶟ?
What is the normal count of platelets per mmᶟ?
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What is the volume of blood in a healthy adult?
What is the volume of blood in a healthy adult?
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Study Notes
Blood Composition
- Blood is a liquid tissue composed of 55% plasma and 45% formed elements (red blood cells, white blood cells, and platelets)
- Plasma is made up of 92% water, 7% proteins, and 1% nutrients, hormones, and gases
Blood Formation
- Blood is formed in the bone marrow, specifically in the cancellous bone tissue
White Blood Cells (WBCs)
- The normal count of WBCs per mm³ is 4,500-11,000
- WBCs, also known as leukocytes, are responsible for fighting infections and diseases
Platelets
- The normal count of platelets per mm³ is 150,000-400,000
- Platelets, also known as thrombocytes, are responsible for blood clotting and hemostasis
Blood Volume
- The total volume of blood in a healthy adult is approximately 5 liters (11.3 pints)
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