Questions and Answers
Blank 1: The hematopoietic system consists of the bone marrow, liver, spleen, lymph nodes, and ______.
thymus
Blank 2: Hematopoietic stem cells (HSCs) are the foundation of the adult hematopoietic system. It is now widely accepted that the embryo produces the first adult repopulating ______.
HSCs
Blank 3: Functionally, three types of human stem cells exist: 1. Totipotent stem cells - These cells are present in the first few hours after an ovum is fertilized. - The most versatile type of stem cell - Can develop into any human cell type, including development from ______.
embryo into fetus
Blank 4: Pluripotent stem cells - These cells are present several days after fertilization. - Can develop into any cell type, except they cannot develop into a ______.
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Blank 5: Hematopoiesis is the process of blood cell production, differentiation, and development. The hematopoietic system consists of the bone marrow, liver, spleen, lymph nodes, and ______.
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What is the process of blood cell production, differentiation, and development called?
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What are the three types of human stem cells?
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Which type of stem cell is the most versatile and can develop into any human cell type?
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What are the components of the hematopoietic system?
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Which type of stem cells are the foundation of the adult hematopoietic system?
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Study Notes
Hematopoietic System
- The hematopoietic system consists of the bone marrow, liver, spleen, lymph nodes, and thymus.
- The system is responsible for blood cell production, differentiation, and development.
Hematopoietic Stem Cells (HSCs)
- HSCs are the foundation of the adult hematopoietic system.
- The embryo produces the first adult repopulating HSCs.
Types of Human Stem Cells
- There are three types of human stem cells: totipotent, pluripotent, and multipotent.
- Totipotent stem cells:
- Present in the first few hours after fertilization.
- The most versatile type of stem cell.
- Can develop into any human cell type, including development from embryoblast.
- Pluripotent stem cells:
- Present several days after fertilization.
- Can develop into any cell type, except they cannot develop into a complete organism.
- Multipotent stem cells:
- Not mentioned in the provided text.
Hematopoiesis
- Hematopoiesis is the process of blood cell production, differentiation, and development.
- It is a crucial function of the hematopoietic system.
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