Question

Bone marrow is made up of :

• A. Muscular fibers and fatty tissue
• B. Fatty tissue and areolar tissue
• C. Fatty tissue and cartilage
• D. Fatty tissue, areolar tissue, and blood vessels

Answer 1

The correct option is D

Fatty tissue, areolar tissue, and blood vessels

The correct option is D:

Explanation of the correct option :

Option D:

1. Bone cavity is filled with soft and semisolid fatty tissue known as bone marrow.
2. Bone marrow is made up of adipose(fatty) tissue, areolar tissue and blood cells.
3. Types of bone marrow include red marrow and yellow marrow.
4. Red bone marrow is primarily composed of hematopoietic tissue and helps in the production of RBCs, WBCs, and platelets.
5. Yellow bone marrow is primarily composed of fat cells and it helps store fat.

Explanation of the incorrect option :

Option A:

1. Muscular fibers are made up of a single muscle cell.
2. They aid in the control of the body's physical forces and are not a part of bone marrow composition.

Option B:

1. Cartilage is a type of connective tissue that can be found in various parts of the body, including the elbows and knees.
2. It stands different from bone and also is not a part of bone marrow.

Option C:

In addition to fatty tissues and areolar tissue, bone marrow also consists of blood vessels.

Final answer: Bone marrow comprises fatty tissue, areolar tissue, and blood vessels.