Question

Yellow bone marrow occurs in medullary cavity of
A. Short bones
B. Spongy bones
C. Long bones
D. All the above

Answer 1

Hint: Bone marrow is a spongy tissue and present inside the bones. In compact (dense) and spongy (cancellate) bones, there will not be ample space to store the tissue.

Complete answer:
-The human body is beheld by the framework of bones, called skeletons. An adult human skeleton consists of 206 bones. Each bone has a shaft and a cavity. The central cavity present in the bone shafts is called the medullary cavity. Medullary cavity stores all the types of bone marrow red, yellow, and pink as well. Due to this function, this cavity is known as a marrow cavity as well.
The diagram below shows us different parts inside a bone.

Bone marrow is a spongy tissue found in the bone shafts which are responsible for the production of red and white blood cells and platelets and hence, maintain their count. The yellow bone marrow gets its name by the color of the bone marrow. It has yellow pigmentation because of the high aggregation of fatty tissues or adipose tissues.
-According to option A, they are found in short bones which is incorrect as they are found in long bones only.
-According to option B, they are found in spongy bones, which is incorrect because spongy bones contain only red bone marrow.
-Option C stands corrected because yellow bone marrow is found inside the long bones.
-Option D is incorrect as options A and B are false.

Hence option C is correct.

Note:
Bone marrow is very crucial for survival. It is generally found in the skull, vertebrae, hips, and thigh bones. When a child is born, it only has red bone marrow but with age and collection of fatty tissues, it turns yellow. In case of heavy blood loss and loss of red blood cells; yellow bone marrow has a tendency to turn back into red bone marrow.