Question

the cortex of the long bones diaphysis is made of ______.

a marrow
b compact bone
c spongy bone
d dense regularconnective tissue
e articular cartilage

Explanation:

Identify the anatomical region

The question asks about the composition of the cortex (outer layer) of a long bone's diaphysis (shaft).

Analyze the tissue composition of the diaphysis

The diaphysis of a long bone consists of a thick outer collar of dense, hard bone tissue surrounding a central medullary cavity. This outer protective layer is known as cortical bone.

Match with the correct option

Cortical bone is composed of compact bone tissue, which provides strength and resists compressive forces. Spongy bone is primarily found in the epiphyses (ends) of long bones, marrow fills the medullary cavity, dense regular connective tissue forms tendons/ligaments, and articular cartilage covers joint surfaces. Therefore, the cortex is made of compact bone.

Answer:

• A marrow
• B compact bone (Correct answer)
• C spongy bone
• D dense regularconnective tissue
• E articular cartilage