APPLIED RADIOLOGICAL ANATOMY

ANATOMY

MUSCULOSKELETAL AND SOFT TISSUE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Some bones make blood to replace the blood cells that die as they age. What two systems are working closely together?
A
musculoskeletal and circulatory systems
B
musculoskeletal and respiratory systems
C
nervous and musculoskeletal systems
D
circulatory and nervous systems
Explanation: 

Detailed explanation-1: -Blood cells are made in the bone marrow. The bone marrow is the soft, spongy material in the center of the bones. It produces about 95% of the body’s blood cells. Most of the adult body’s bone marrow is in the pelvic bones, breast bone, and the bones of the spine.

Detailed explanation-2: -Healthy bone requires a substantial blood flow to supply the requisite oxygen and nutrients, and to eliminate carbon dioxide, acid and other metabolic waste products. Estimates of the proportion of the cardiac output received directly by the skeleton range from about 5.5% to 11% (13–15).

Detailed explanation-3: -The soft bone marrow, which is found inside many bones, makes most of the body’s red blood cells, white blood cells, and platelets.

Detailed explanation-4: -Red blood cells are formed in the red bone marrow of bones. Stem cells in the red bone marrow are called hemocytoblasts. They give rise to all of the formed elements in blood. If a stem cell commits to becoming a cell called a proerythroblast, it will develop into a new red blood cell.

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