A long bone is ____________?
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Answer: A. Femur
Explanation
The femur is recognized as the longest and strongest long bone in the body. Anatomical classification confirms that the femur qualifies as a primary long bone. The thigh bone, known scientifically as the femur, exemplifies classic long bone structure. Long bones feature a shaft and two extremities, functioning primarily as levers for movement. The femur withstands immense mechanical loads generated during running, jumping, and lifting. Yellow bone marrow is stored within the central medullary cavity of adult long bones.
Orthopedic surgeons frequently treat femur fractures resulting from high-impact trauma accidents. Anthropologists use long bone measurements to estimate height in forensic investigation cases. Understanding bone strength helps prevent debilitating osteoporosis-related fractures in older adults. Option B suggests phalanges, which are classified anatomically as miniature long bones. Option C proposes ulna, a long bone in the forearm rather than the lower limb. Option D lists humorus, misspelled as humerus, which is a long bone in the upper arm.
- Subject
- Physical Education
- Category
- Physical Education
- Topic
- —
- Difficulty
- medium
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