Chapter 19 Blood (Steps of hematopoiesis)

Question 1

What is the first step of hematopoiesis?

Answer 1

Embryo blood cells appear in bloodstream during the 3rd week of development.

Question 2

What is the second step of hematopoiesis?

Answer 2

Cells move out of blood into liver, spleen, thymus, and bone marrow.

Question 3

What is the third step of hematopoiesis?

Answer 3

The embryonic cells become stem cells.

Question 4

What is the forth step of hematopoiesis?

Answer 4

Stem cells produce blood cells.

Question 5

What is the fifth step of hematopoiesis?

Answer 5

In adults “red bone marrow” is the only site of WBC/RBC formation.

Question 6

What is the 6th step of hematopoiesis?

Answer 6

Stem cells can divide to produce myeloid stem cell and lympoid stem cells.

Question 7

What is the 7th step of hematopoiesis?

Answer 7

Lympoid stem cells produce lympocytes; myeloid stem cells produce RBCs and WBCs (except for lympocytes)