Chapter Twelve Axial Muscles 251 24. Match the muscle of the abdominal wall list

Question

Chapter Twelve Axial Muscles 251 24. Match the muscle of the abdominal wall listed in column A with the direction of the fbers listed in column B. O Column A external obiques Internal obliques rectus abdominis transverse abdominis Column B a. horizontal b. Inferiolateral (down and away from middle c. Iinferioromedial (down and toward middle) d vertical Exercise 12.12: The Rectus Sheath, Inguinal Ligament, and Inguinal Canal 25. What structures divide the rectus abdominis Into four segments (forming the traditional "sixpack of muscles)? The fibrous sheath that encloses the rectus abdominis is the to form a vertical brous strip called the The sheath comes together at the midlne (which sometimes darkens during pregnancy!. 26. What structures run through the inguinal canal? Males: Females: Can You Apply What You've Learned? 27. Explain the major difference in muscular movement produced by the masseter and the temporalils during mastication (chewingl 28. Explain how the suprahyold and infrahyoid muscles are named 29. a. Describe the action of the stern if both heads are contracted simultaneously If only the right clavicular head b. Deseribe the action of the 30. Explain how the external obliques, internal obliques, and transversa abdomens muscles relate to the recus smut canal Why de you thie such henas 31. In a Indirect Inguinal hernia, abdominal contents, such as a loop of small ntestine, pess into the are more common in maies than in females?

Explanation / Answer

24.

External oblique - c. Infero medial(like putting hand into pant pocket)

Internal oblique - b. Infero lateral

Rectus abdominis - d. Vertical

Transverse abdominis - a. Horizontal

12.12

25. Band of connective tissue called tendinous intersections traverse the rectus abdominis muscle seperating it into muscle bellies which gives the six pack pattern.

The fibrous sheath enclosing the rectus abdominis muscle is the rectus sheaths. In midline it forms linea alba.

26.

Inguinal canal

In male : spermatic cord.

In female : round ligament of ovary.

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