Scribd
Upload
58 views4 pages

Upper Limb

The document describes 4 main bones of the upper limb: the humerus in the arm, the ulna and radius in the forearm, and the carpal bones in the wrist. The humerus connects to the scapula to form the shoulder joint. The ulna and radius run parallel in the forearm and connect to the humerus at the elbow joint. The carpal bones are arranged in two rows to form the base of the hand.

Uploaded by

quality writers
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
58 views4 pages

Upper Limb

The document describes 4 main bones of the upper limb: the humerus in the arm, the ulna and radius in the forearm, and the carpal bones in the wrist. The humerus connects to the scapula to form the shoulder joint. The ulna and radius run parallel in the forearm and connect to the humerus at the elbow joint. The carpal bones are arranged in two rows to form the base of the hand.

Uploaded by

quality writers
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
You are on page 1/ 4

1

Description of 4 bones of the upper limb

Student Name

Institution

Tutor

Course
2

Description of 4 bones of the upper limb

The upper limb is made up of three sections that consist of the arm that lies between the

shoulder and the elbow joints. In addition there is the forearm that lies between the elbow and the

wrist while the hand lies distal to the wrist. Each upper limb is made up of thirty bones. The

main bones in the upper limb are humerus that is found in the arm (Patel & Varacallo, 2021).

The ulna and the radius are connected bones that form the forearm. There are eight carpal bones

that form the base of the hand while there are five metacarpal bones that form the palm of the

hand.

Humerus is the only bone that lies in the arm region whereby its end forms its head. The

bone is huge, round, smooth and faces medially. The head of the bone links with glenoid cavity

found in the scapula to form the shoulder joint. The margin of the bones smooth head is referred

to as its anatomical neck. The bone has greater and lesser tabernacles that give attachment parts

for muscles found in the shoulder. The ulna bone is the medial bone of the forearm that runs

parallel to the radius known as the lateral bone of the forearm. The end of the ulna bone is

similar to a crescent wretch and has a tronchear notch that connects with tronchlea of the

humerus to form the elbow joint. Radius bone lies parallel to the ulna whereby its head is disk-

shaped forming the proximal end (Patel & Varacallo, 2021).The bone has a small depression on

its head that articulates with the capitulum in the humerus to form the elbow joint while the

smooth and outer margin of radius bone head connects with radial notch in the ulna at the

radioulnar joint. The bone has radial tuberosity that is ovals shaped and gives allowance for

muscle attachment. Carpal bones that forms the series of eight bones that form the hand that are

arranged in two rows to form proximal rows composed of four bones as well as a diastal row

comprised of four carpaw bones. Bones found in the proximal row that lie from the lateral to the
3

medial region are scaphoid,pisiform,lunate and triquetrum.Pisiform are projected anteriorly to

form the bony bump felt at hand base.


4

References

Patel M, and Varacallo M. (2021) Anatomy, shoulder and upper limb, forearm bones - StatPearls
- NCBI bookshelf. (2021, July 19). National Center for Biotechnology
Information. https://www.ncbi.nlm.nih.gov/books/NBK545260/

You might also like