Podcast
Questions and Answers
Which of the following are types of granulocytes? (Select all that apply)
Which of the following are types of granulocytes? (Select all that apply)
White blood cells (WBCs) do not contain a nucleus.
White blood cells (WBCs) do not contain a nucleus.
False
How long do red blood cells live?
How long do red blood cells live?
120 days
Dead RBCs are removed and destroyed by fixed phagocytic macrophages in the ______ and ______.
Dead RBCs are removed and destroyed by fixed phagocytic macrophages in the ______ and ______.
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Which type of white blood cell can be subdivided into T cells, B cells, and NK cells?
Which type of white blood cell can be subdivided into T cells, B cells, and NK cells?
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Match the following WBC types with their percentage in total WBC count:
Match the following WBC types with their percentage in total WBC count:
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Study Notes
Normal Blood Cells
- A microscopic image shows normal blood cells.
Life Span
- Red blood cells (RBCs) have a life span of approximately 120 days.
- After 120 days, RBCs are removed from blood and destroyed by fixed phagocytic macrophages in the spleen and liver.
- Breakdown products, including heme and proteins, are recycled.
White Blood Cells (WBCs) or Leukocytes
- WBCs have a nucleus but do not contain hemoglobin (Hb).
- The total count of WBCs is between 4000-11000/mm3.
- WBCs are divided into two categories:
-
Granulocytes, which contain granules in their cytoplasm:
- Neutrophils (60-70%)
- Eosinophils (2-4%)
- Basophils (1%)
-
Non-granulocytes, which do not contain granules:
- Lymphocytes (20-25%)
- Monocytes (3-8%)
Leukocytes Classification
- WBCs are classified into two categories:
-
Agranular:
-
Lymphocytes (20-25%):
- T cells
- B cells
- NK cells
- Monocytes (3-8%)
-
Lymphocytes (20-25%):
-
Granular:
- Basophils (0.5-1%)
- Neutrophils (60-70%)
- Eosinophils (2-4%)
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Description
Learn about the structure and function of normal blood cells, including red and white blood cells, their life span, and components.
