Podcast
Questions and Answers
What is the shape of the scapula bone?
What is the shape of the scapula bone?
Which bone forms the shoulder joint with the humerus?
Which bone forms the shoulder joint with the humerus?
What is the part of the humerus that articulates with the scapula?
What is the part of the humerus that articulates with the scapula?
Which bone is located laterally of the ulna?
Which bone is located laterally of the ulna?
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How many bones are in the proximal row of the carpals?
How many bones are in the proximal row of the carpals?
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What is the distal end of the radius bone connected to?
What is the distal end of the radius bone connected to?
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How many bones are in the hand, excluding the wrist?
How many bones are in the hand, excluding the wrist?
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How many phalanges are in the thumb?
How many phalanges are in the thumb?
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Study Notes
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)
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Description
Test your knowledge of the bones in the upper limb, including the scapula and humerus.
