Blood Cell Formation/Bone Marrow

What is the life span of Red blood cells?

120 days

Hematopoiesis

process by which blood cells are formed. 

What is the same as Hematopoiesis?

Erythropoiesis

What is the process called when Red blood cells (RBC) cannot divide and the bone marrow must continuously replace worn-out RBCs?

Erythropoiesis 

What is Erythropoiesis stimulated by?

Erythropoietin (EPO)

Erythropoietin (EPO)

a hormone secreted by the kidneys in response to reduced oxygen delivery to tissues.

Where is Bone Marrow located?

Within all bones.

Red Marrow

actively generates new blood cells

What does Red marrow contains? 

Immature erythrocytes 

Where is red marrow located in adults?

Between trabeculae of spongy bone of axial skeleton

Girdles (Pelvic & Glenohumeral)

Proximal Epiphyses of Humerus & Femur

Yellow marrow 

dormant (inactive) 

What does Yellow Marrow contains?

many fat cells

Where is Yellow marrow located?

Long bones of adults

When does Yellow marrow makes blood cells? 

Only in Emergencies