Which is an example of a long bone?

Which is an example of a long bone?

• A. Femur
• B. Vertebra
• C. Carpals
• D. Patella

Answer: (A)

Long bones are elongated structures with a long shaft and two ends, designed to support weight and act as levers for movement. They have a thick outer layer of compact bone around a central marrow cavity, which helps them withstand large forces. The femur fits this description perfectly: it’s the thigh bone, much longer than it is wide, extending from the hip to the knee, and built to carry the body's weight while providing powerful leverage for muscles. In contrast, vertebrae are irregular bones with a different shape for protecting the spinal cord, carpals are short bones in the wrist, and the patella is a sesamoid bone that sits within a tendon to improve knee mechanics.

Long bones are elongated structures with a long shaft and two ends, designed to support weight and act as levers for movement. They have a thick outer layer of compact bone around a central marrow cavity, which helps them withstand large forces. The femur fits this description perfectly: it’s the thigh bone, much longer than it is wide, extending from the hip to the knee, and built to carry the body's weight while providing powerful leverage for muscles. In contrast, vertebrae are irregular bones with a different shape for protecting the spinal cord, carpals are short bones in the wrist, and the patella is a sesamoid bone that sits within a tendon to improve knee mechanics.