The Femur is the longest and strongest bone in the human body.
It extends from the hip to the knee.
It supports the weight of the body during standing, walking, and running.
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🔹 Parts of the Femur:
1. Upper End:
Head: Rounded, fits into the acetabulum (hip socket) to form the hip joint.
Neck: Connects head to shaft; common site of fractures.
Greater trochanter: Large lateral projection for muscle attachment.
Lesser trochanter: Smaller posteromedial projection.
2. Shaft (Body):
Long, cylindrical part.
Slightly convex forward.
Has linea aspera on the posterior surface (ridge for muscle attachment).
3. Lower End:
Forms part of the knee joint.
Includes:
Medial and lateral condyles – articulate with tibia.
Intercondylar fossa – between the condyles.
Patellar surface – for the patella.
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🔸 Joints Formed:
Hip joint (with acetabulum).
Knee joint (with tibia and patella).
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🔹 Clinical Note:
Fracture neck of femur is common in elderly (hip fracture).
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