Question

question 4 of 20 :
select the best answer for the question.

1. in a long bone, such as the femur in the leg, the center of the bone contains which substance, responsible for producing blood cells?

a. ligaments
b. plasma
c. synovial fluid
d. marrow
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Explanation:

• Option A: Ligaments connect bones to other bones, not involved in blood - cell production in the bone center.
• Option B: Plasma is the liquid part of blood, not a substance within the bone center for blood - cell production.
• Option C: Synovial fluid is found in joints, lubricating them, and has nothing to do with blood - cell production in bones.
• Option D: Marrow, specifically red marrow, is located in the center of long bones (like the femur) and is responsible for producing blood cells.

Answer:

D. Marrow