Upper Limb Bones Quiz

Upper Limb Bones

Scapula (Shoulder Blade)

• Triangular flat bone
• Located posteriorly (at the back) of the thorax (chest)
• Forms the shoulder joint with the humerus
• Provides attachment points for muscles that move the arm

Humerus (Upper Arm Bone)

• Long bone in the upper arm
• Extends from the shoulder joint to the elbow joint
• Consists of:
  • Head: articulates with the scapula
  • Shaft: long, cylindrical part
  • Condyles: lower end of the humerus, articulates with the radius and ulna

Radius (Forearm Bone)

• Smaller of the two bones in the forearm
• Located laterally (on the thumb side) of the ulna
• Consists of:
  • Head: articulates with the humerus
  • Neck: narrow part below the head
  • Shaft: long, curved part
  • Distal end: articulates with the carpal bones

Ulna (Forearm Bone)

• Larger of the two bones in the forearm
• Located medially (on the pinky side) of the radius
• Consists of:
  • Olecranon: proximal end, forms the elbow joint
  • Shaft: long, curved part
  • Distal end: articulates with the carpal bones

Carpals (Wrist Bones)

• 8 small bones that form the wrist joint
• Arranged in two rows:
  • Proximal row: scaphoid, lunate, triquetrum, and pisiform
  • Distal row: trapezium, trapezoid, capitate, and hamate

Metacarpals (Hand Bones)

• 5 long bones that connect the wrist to the fingers
• Each metacarpal bone connects to a carpal bone and a phalanx

Phalanges (Finger Bones)

• 14 bones that form the fingers and thumb
• Each finger has 3 phalanges (proximal, intermediate, and distal)
• The thumb has only 2 phalanges (proximal and distal)

Upper Limb Bones

Scapula (Shoulder Blade)

• Triangular flat bone located posteriorly in the thorax
• Forms the shoulder joint with the humerus
• Provides attachment points for muscles that move the arm

Humerus (Upper Arm Bone)

• Long bone extending from the shoulder joint to the elbow joint
• Composed of head, shaft, and condyles
• Head articulates with the scapula
• Condyles articulate with the radius and ulna

Radius (Forearm Bone)

• Smaller forearm bone, located laterally
• Composed of head, neck, shaft, and distal end
• Head articulates with the humerus
• Distal end articulates with the carpal bones

Ulna (Forearm Bone)

• Larger forearm bone, located medially
• Composed of olecranon, shaft, and distal end
• Olecranon forms the elbow joint
• Distal end articulates with the carpal bones

Carpals (Wrist Bones)

• 8 small bones forming the wrist joint
• Arranged in two rows: proximal and distal
• Proximal row: scaphoid, lunate, triquetrum, and pisiform
• Distal row: trapezium, trapezoid, capitate, and hamate

Metacarpals (Hand Bones)

• 5 long bones connecting the wrist to the fingers
• Each metacarpal bone connects to a carpal bone and a phalanx

Phalanges (Finger Bones)

• 14 bones forming the fingers and thumb
• Each finger has 3 phalanges (proximal, intermediate, and distal)
• The thumb has only 2 phalanges (proximal and distal)