Multiple Choice
The heel bone is called the __________.
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7. The Skeletal System
Bone of the Lower Limb
Problem 18
Textbook Question
The bones of the leg are the medial_____and the lateral______. The sesamoid bone that articulates with the distal femur is the______.
Verified step by step guidance1
Step 1: Understand the anatomy of the leg. The leg consists of two primary bones in the lower limb: one located medially (toward the midline of the body) and the other laterally (away from the midline). These bones are part of the skeletal system and play a role in movement and support.
Step 2: Identify the medial bone of the leg. The medial bone is the tibia, which is larger and bears most of the weight. It is located on the inner side of the leg.
Step 3: Identify the lateral bone of the leg. The lateral bone is the fibula, which is thinner and located on the outer side of the leg. It provides attachment points for muscles but does not bear significant weight.
Step 4: Recognize the sesamoid bone that articulates with the distal femur. A sesamoid bone is a small, round bone embedded within a tendon. In this case, the sesamoid bone is the patella, commonly known as the kneecap, which articulates with the distal femur and aids in knee movement.
Step 5: Combine the anatomical terms to complete the blanks in the problem. The medial bone is the tibia, the lateral bone is the fibula, and the sesamoid bone that articulates with the distal femur is the patella.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Medial and Lateral Bones of the Leg
In the context of the leg, the medial bone refers to the tibia, which is the larger and stronger bone located on the inner side of the leg. The lateral bone is the fibula, which is thinner and runs parallel to the tibia on the outer side. Understanding the anatomical positions of these bones is crucial for identifying their roles in leg movement and stability.
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Medial and Lateral
Sesamoid Bones
Sesamoid bones are small, round bones that are embedded within tendons, typically found in locations where a tendon passes over a joint. The patella, or kneecap, is the most well-known sesamoid bone, but in this context, the sesamoid bone that articulates with the distal femur is likely the fabella. These bones help to protect tendons and improve their mechanical function.
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Articulation in the Skeletal System
Articulation refers to the connection between two bones, forming a joint that allows for movement and flexibility. In the case of the distal femur, it articulates with the tibia and the patella at the knee joint. Understanding how these articulations function is essential for comprehending the biomechanics of the leg and the overall movement of the body.
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