Bone Marrow Structure and Function

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Questions and Answers

What is the main function of bone marrow?

  • To store energy
  • To produce hormones
  • To produce blood cells (correct)
  • To filter waste

What is the composition of bone marrow?

  • 90% hematopoietic stem cells, 10% stromal cells
  • 70% hematopoietic stem cells, 30% stromal cells (correct)
  • 50% hematopoietic stem cells, 50% stromal cells
  • 30% hematopoietic stem cells, 70% stromal cells

What is the process of producing red blood cells?

  • Hematopoiesis
  • Thrombopoiesis
  • Granulopoiesis
  • Erythropoiesis (correct)

What type of stem cell can differentiate into different blood cell types?

<p>Hematopoietic stem cells (C)</p> Signup and view all the answers

What is the name of the process of blood cell formation and development?

<p>Hematopoiesis (A)</p> Signup and view all the answers

What is the name of the type of bone marrow found in compact bones?

<p>Yellow bone marrow (A)</p> Signup and view all the answers

What is a treatment for certain blood disorders and cancers?

<p>Bone marrow transplantation (A)</p> Signup and view all the answers

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Study Notes

Function

  • Produces blood cells: red blood cells, white blood cells, and platelets
  • Responsible for hematopoiesis: the process of blood cell formation and development

Structure

  • Spongy, fatty tissue found in the cavities of bones
  • Divided into two types:
    • Red bone marrow: found in spongy bones, responsible for hematopoiesis
    • Yellow bone marrow: found in compact bones, composed mostly of fat cells

Composition

  • 70% of bone marrow is composed of hematopoietic stem cells and their progeny
  • 30% is composed of stromal cells: fat cells, reticular cells, and osteoblasts

Stem Cells

  • Hematopoietic stem cells: capable of differentiating into different blood cell types
  • Mesenchymal stem cells: capable of differentiating into stromal cells

Blood Cell Production

  • Erythropoiesis: production of red blood cells
  • Granulopoiesis: production of white blood cells (granulocytes)
  • Thrombopoiesis: production of platelets

Clinical Significance

  • Bone marrow disorders: anemia, leukemia, lymphoma, and multiple myeloma
  • Bone marrow transplantation: a treatment for certain blood disorders and cancers

Function of Bone Marrow

  • Produces blood cells: red blood cells, white blood cells, and platelets
  • Responsible for hematopoiesis, the process of blood cell formation and development

Structure of Bone Marrow

  • Spongy, fatty tissue found in the cavities of bones
  • Divided into two types: red bone marrow and yellow bone marrow
  • Red bone marrow: found in spongy bones, responsible for hematopoiesis
  • Yellow bone marrow: found in compact bones, composed mostly of fat cells

Composition of Bone Marrow

  • 70% composed of hematopoietic stem cells and their progeny
  • 30% composed of stromal cells: fat cells, reticular cells, and osteoblasts

Types of Stem Cells

  • Hematopoietic stem cells: capable of differentiating into different blood cell types
  • Mesenchymal stem cells: capable of differentiating into stromal cells

Blood Cell Production Process

  • Erythropoiesis: production of red blood cells
  • Granulopoiesis: production of white blood cells (granulocytes)
  • Thrombopoiesis: production of platelets

Clinical Significance of Bone Marrow

  • Bone marrow disorders: anemia, leukemia, lymphoma, and multiple myeloma
  • Bone marrow transplantation: a treatment for certain blood disorders and cancers

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