What type of tissue primarily composes the body of a long bone?

What type of tissue primarily composes the body of a long bone?

• A. Cancellous tissue
• B. Cortical tissue
• C. Adipose tissue
• D. Muscle tissue

Answer: (B)

The body of a long bone, known as the diaphysis, is primarily composed of cortical tissue, also referred to as compact bone. Cortical tissue is dense and forms the outer shell of the bone, providing strength and structural support. Its thickness varies, depending on the location and the mechanical forces acting on the bone. This dense arrangement allows for the transmission of weight and stress during movement and activities.

In contrast, cancellous tissue, or trabecular bone, is found primarily at the ends of long bones and within the interior of others, playing different roles such as housing bone marrow and reducing the overall weight of the skeleton. Adipose tissue serves as a storage for fat and is not a primary component of bone structure. Muscle tissue is responsible for movement but does not play a direct role in the composition of the bone itself. Understanding the specific roles and characteristics of these tissues is crucial in the study of human anatomy and musculoskeletal health.