muscles of the upper body part 2

Extensor carpi ulnaris

O: lateral epicondyle of humerus, poterior border of ulna

I: base of 5th metacarpal

A: extends and adducts hand

Extensor Digitorum Communis

O: lateral epicondyle of humerus

I: By 4 tendons to 2nd and 3rd phalanges of 4 fingers

A: extends phalanges

Extensor carpi radialis brevis

O: lateral epicondyle of humerous

I: 3rd metacarpal

A: extends and abducts hand

Extensor carpi radialis longus

O: lateral supracondylar ridge of humorus

I: 2nd metacarpal

A: extends and abducts hand

Abductor pollicis longus

Extensor pollicis brevis

• 22 viscera pleura
• 13 parietal pleura

apex

epicardium

myocardium

endocardium

intraventricular septum