Podcast
Questions and Answers
What is the function of the scapula?
What is the function of the scapula?
What is the role of the radius bone?
What is the role of the radius bone?
How many carpals are there in the human wrist?
How many carpals are there in the human wrist?
What is the function of the humerus?
What is the function of the humerus?
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What is the role of the ulna bone?
What is the role of the ulna bone?
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How many phalanges are there in the human hand?
How many phalanges are there in the human hand?
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Study Notes
Upper Limb Bones
Scapula (Shoulder Blade)
- Triangular flat bone that forms the posterior wall of the thorax
- Attaches to the humerus (upper arm bone) and clavicle (collarbone)
Clavicle (Collarbone)
- Long, curved bone that connects the scapula to the sternum (breastbone)
- Forms the anterior (front) part of the shoulder girdle
Humerus (Upper Arm Bone)
- Long bone that connects the scapula to the radius and ulna (forearm bones)
- Divided into:
- Proximal end (near the shoulder): connects to the scapula
- Body (shaft): long, cylindrical part of the bone
- Distal end (near the elbow): connects to the radius and ulna
Radius and Ulna (Forearm Bones)
- Two bones that connect the humerus to the carpals (wrist bones)
- Radius:
- Smaller bone that connects to the thumb side of the hand
- Rotates to allow for forearm rotation
- Ulna:
- Larger bone that connects to the pinky finger side of the hand
- Forms the medial (inner) part of the forearm
Carpals (Wrist Bones)
- Eight small bones that form the wrist joint
- Divided into two rows:
- Proximal row: scaphoid, lunate, triquetrum, pisiform
- Distal row: trapezium, trapezoid, capitate, hamate
Metacarpals (Hand Bones)
- Five long bones that connect the carpals to the phalanges (finger bones)
- One for each finger, numbered 1-5
Phalanges (Finger Bones)
- 14 small bones that form the fingers and thumb
- Divided into:
- Proximal phalanges: base of each finger
- Intermediate phalanges: middle of each finger
- Distal phalanges: tip of each finger
Upper Limb Bones
Scapula (Shoulder Blade)
- Forms the posterior wall of the thorax
- Attaches to the humerus and clavicle
Clavicle (Collarbone)
- Connects the scapula to the sternum
- Forms the anterior part of the shoulder girdle
Humerus (Upper Arm Bone)
- Divided into three parts: proximal end, body, and distal end
- Proximal end connects to the scapula
- Body is the long, cylindrical part of the bone
- Distal end connects to the radius and ulna
Radius and Ulna (Forearm Bones)
- Radius: smaller bone that connects to the thumb side of the hand
- Radius rotates to allow for forearm rotation
- Ulna: larger bone that connects to the pinky finger side of the hand
- Ulna forms the medial part of the forearm
Carpals (Wrist Bones)
- Eight small bones that form the wrist joint
- Divided into two rows: proximal and distal
- Proximal row consists of scaphoid, lunate, triquetrum, and pisiform
- Distal row consists of trapezium, trapezoid, capitate, and hamate
Metacarpals (Hand Bones)
- Five long bones that connect the carpals to the phalanges
- One metacarpal for each finger, numbered 1-5
Phalanges (Finger Bones)
- 14 small bones that form the fingers and thumb
- Divided into proximal, intermediate, and distal phalanges
- Proximal phalanges are at the base of each finger
- Intermediate phalanges are in the middle of each finger
- Distal phalanges are at the tip of each finger
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Description
Learn about the bones of the upper limb, including the scapula, clavicle, and humerus, and their functions in the human body.
