VAN 121: Veterinary Gross Anatomy-II (2+2)

OBLIQUUS ABDOMINIS EXTERNUS 

Obliquus abdominis externus (external oblique muscle)

• This is the largest and the most superficial and extensive of all the abdominal muscles. The fibres of this muscle are directed downwards and backwards. It is having muscular and aponeurotic parts.
• Origin: The lateral faces of ribs extending from the lower part of the fifth rib to the last rib above its middle and the lumbo-dorsal fascia.
• Insertion: Linea alba, prepubic tendon and tuber coxae.