Arm Bones Overview

Study Notes

Arm Bones Overview

The arm consists of multiple bones, crucial for movement and dexterity.

Radius

One of the two long bones in the forearm, located on the thumb side.
Involved in wrist motion and forearm rotation.

Ulna

The other long bone in the forearm, positioned on the opposite side of the radius (pinky side).
Acts as a stabilizing bone and forms the elbow joint with the humerus.

Carpals

A set of eight small bones that form the wrist, allowing for intricate wrist movements.
Arranged in two rows, they facilitate the transition between the forearm and hand.

Metacarpals

Five long bones that make up the middle part of the hand.
Each metacarpal connects to a finger and contributes to hand grip strength and mobility.

Phalanges

The bones of the fingers, comprising three segments per finger (proximal, middle, distal) except for the thumb, which has two.
Essential for fine motor skills and gripping.

Humerus

The single long bone in the upper arm, connecting the shoulder to the elbow.
Supports arm movement and serves as the attachment point for muscles.

Scapula

Also known as the shoulder blade, it connects the humerus with the clavicle.
Plays a vital role in shoulder stability and arm movement.

Clavicle

Known as the collarbone, it serves as a strut between the shoulder blade and the sternum.
Protects blood vessels and nerves running to the arm and facilitates arm movement.

Description

This quiz covers the anatomy of the arm bones, focusing on the radius, ulna, carpals, metacarpals, phalanges, and humerus. Understanding the structure and functions of these bones is essential for comprehending human movement and dexterity. Test your knowledge about the bone composition and their roles in arm functionality.