Which bones are longer than they are wide and are typically found in the limbs?

Which bones are longer than they are wide and are typically found in the limbs?

• A. Long bones
• B. Flat bones
• C. Irregular bones
• D. Sesamoid bones

Answer: (A)

Long bones are defined by their elongated, cylindrical shape—longer than they are wide. This design makes them ideal for acting as levers in the limbs, where they support movement and bear body weight. They have a shaft (the diaphysis) made mostly of compact bone, with ends (the epiphyses) that are often filled with spongy bone and coated with articular cartilage where joints form. Examples include bones like the femur, humerus, tibia, and radius. Other bone types don’t fit the description: flat bones are thin and broad (like skull bones), irregular bones have complex shapes (like vertebrae), and sesamoid bones are small bones embedded in tendons (like the patella).

Long bones are defined by their elongated, cylindrical shape—longer than they are wide. This design makes them ideal for acting as levers in the limbs, where they support movement and bear body weight. They have a shaft (the diaphysis) made mostly of compact bone, with ends (the epiphyses) that are often filled with spongy bone and coated with articular cartilage where joints form. Examples include bones like the femur, humerus, tibia, and radius.

Other bone types don’t fit the description: flat bones are thin and broad (like skull bones), irregular bones have complex shapes (like vertebrae), and sesamoid bones are small bones embedded in tendons (like the patella).