Ms Bone Structure

Question 1

What is a lunacae (structure)

Answer 1

Lacunae are tiny, cavity-like spaces within the calcified bone matrix. They house mature bone cells called osteocytes.

Question 2

What is a periosteum (structure)

Answer 2

Fibrous tissue surrounding the outer surface of the bone, except the articular sites. Inner layer is osteogenic and is capable of differentiating into osteoblasts. Richly furnished with capillaries and nerves

Question 3

What are the 2 bone structures (structure)

Answer 3

Compact, spongy

Question 4

What is a compact bone (structure)

Answer 4

Dense and solid mass with closely packed, well aligned osteons. It forms the outer surface layer of all bones

Question 5

What is a spongy bone (structure)

Answer 5

Lighter and less dense than compact bone. Bones are arranged in trabeculae, irregularly aligned osteons. The irregular cavities containing red bone marrow

Question 6

What are the 2 bone marrows (structure)

Answer 6

Red, yellow, found in spongy bones

Question 7

What is a red bone marrow (structure)

Answer 7

Contains hematopoietic stem cells that can differentiate into RBC, WBC, and platelets. Its present in all bones before age of 5; and gradually transform into yellow bone marrow. In adult, persist mainly in central skeleton, but also found in ends of long bones

Question 8

What is an osteon (structure)

Answer 8

Osteons are the tiny, cylindrical structural units of compact bone. They consist of concentric layers of bone matrix, lamellae, surrounding a central canal for blood vessels and nerves.

Question 9

What is a yellow bone marrow (structure)

Answer 9

Present in the cavities of long bones; contains adipose (fat) tissues and mesenchymal stem cells that can develop into cartilage, bone, fat, or muscle cells if needed.

Question 10

What is an epiphysis (structure)

Answer 10

The ends of a typical long bone

Question 11

What is a diaphysis

Answer 11

The body of a typical long bone