What is the bone in the lower arm in line with the thumb?

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Study for the Muscular System and Skeletal System Exam. Learn with flashcards and multiple choice questions, where each question has explanations and hints. Be well-prepared and confident on your test day!

Multiple Choice

What is the bone in the lower arm in line with the thumb?

Explanation:
In the forearm, the bone on the thumb side is the radius. In anatomical position, the radius sits on the lateral (thumb) side of the forearm, while the ulna is on the opposite side toward the pinky. The radius extends from the elbow to the wrist and rotates around the ulna to allow turning the palm up or down. The other terms refer to different parts: carpal bones are in the wrist, metacarpals are in the hand. So the bone aligned with the thumb is the radius.

In the forearm, the bone on the thumb side is the radius. In anatomical position, the radius sits on the lateral (thumb) side of the forearm, while the ulna is on the opposite side toward the pinky. The radius extends from the elbow to the wrist and rotates around the ulna to allow turning the palm up or down. The other terms refer to different parts: carpal bones are in the wrist, metacarpals are in the hand. So the bone aligned with the thumb is the radius.

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