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Species variationsox
1.3.4 External abdominal oblique muscle (ssss1–ssss1)
ssss1 Lateral view of the inguinal region of the horse left external oblique abdominal muscle.The spermatic sac is seen emerging from the left superficial inguinal ring.The spermatic sac contains the testicle and the spermatic cord (See Figure 15.4).For a definition of the spermatic sac see Section 16.4
Figure 1.4
ssss1 Lateral view of the abdomen of the ox showing the left external abdominal oblique muscle.
Origin: The lateral surfaces of the ribs caudal to the fourth rib and the lumbodorsal fascia.
Insertion: The linea alba and prepubic tendon.
superficial inguinal ringinguinal ligament
Species variations:dogpigruminantshorse
1.3.5 Internal abdominal oblique muscle (ssss1–ssss1)
ssss1 Lateral view of inguinal area of horse showing the internal abdominal oblique muscle. The left external abdominal oblique muscle has been removed although the position of the left superficial inguinal ring is shown. The mid‐section of the left cremaster muscle has been excised to expose the vaginal tunic.