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Chapter 36: Problem 6

The ____________ attaches to the pelvic girdle. a. radius b. sternum c. femur d. tibia

Short Answer

Expert verified
The femur attaches to the pelvic girdle.

Step by step solution

01

Identify the Pelvic Girdle

The pelvic girdle, often referred to as the pelvis, is a structure in the skeleton that supports the weight of the upper body when sitting and transfers that weight to the lower limbs when standing. It is a crucial component involved in locomotion and structural support.
02

Understand Bone Attachments

The next step is to understand which bones attach to the pelvic girdle. The pelvis forms a joint with the femur; this joint is known as the hip joint. This connection is crucial for leg movement and bearing body weight.
03

Evaluate the Options

Now, evaluate each option based on its anatomical function: - The _radius_ is a bone in the forearm and not connected to the pelvis. - The _sternum_ is a chest bone and not part of the pelvic attachment. - The _femur_ is the thigh bone that forms a joint with the pelvis. - The _tibia_ is a larger bone in the lower leg, connecting instead with the femur.
04

Choose the Correct Answer

Based on the previous step, the femur is the bone that attaches to the pelvic girdle by forming the hip joint.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Femur
The femur is the longest and strongest bone in the human body. It's often referred to as the thigh bone. This bone plays a pivotal role in supporting your body's weight during standing, walking, or running. The femur connects to the pelvis at the top portion, forming the critical hip joint. Due to its long structure, the femur provides substantial leverage for muscle attachment, aiding in powerful leg movements. Furthermore, the femur features both a proximal end that connects with the pelvic girdle and a distal end that connects to the tibia and kneecap. This dual connection enables it to function as a key component in the lower limb's movement and stability.
Hip Joint
The hip joint is a ball-and-socket type of joint formed where the head of the femur fits into the acetabulum of the pelvic girdle. This structure allows for a wide range of motion and flexibility, essential for various activities like walking, running, and jumping. The hip joint's design permits movements such as flexion, extension, abduction, adduction, and rotation. These movements are crucial for maintaining balance and coordination during daily activities. Additionally, the hip joint must balance flexibility and stability to effectively support and transmit the body's weight from the upper body to the lower extremities, making it a hub for dynamic and static motions.
Anatomical Function
The anatomical function of the bones and joints interacting with the pelvic girdle is fundamental to human movement and stability. The pelvic girdle, with its attachment to the femur via the hip joint, plays a critical role in locomotion. Its duty is to bear the body's weight as you stand or move. This weight is transferred effectively to the lower limbs, allowing for stability and mobility. The network of muscles, tendons, and ligaments surrounding these structures also contributes to this framework by enhancing strength and flexibility. Proper understanding of these anatomical functions is essential for appreciating how daily movements and postures are maintained.

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