5 Questions
What is the composition of blood?
Plasma (55%) Free cells (45%)
Where is blood formed?
In bone marrow
What is the normal count of white blood cells (WBCs) per mmᶟ?
4000 – 10,000
What is the normal count of platelets per mmᶟ?
200,000-300,000
What is the volume of blood in a healthy adult?
5-6 liters
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)
Test your knowledge of blood histology with this quiz designed for dental students. Learn to classify different blood cells and describe the histological structure of erythrocytes. Prepare for your BMS 122 lab with this helpful resource.
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