BIOL 1004 Lecture Notes - Vaginal Process, Scrotum, Inferior Epigastric Artery

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Palpate: xyphoid process, ribs, anterior superior iliac spine, inguinal ligament, Can divide abdominal surface two ways (be able to name the regions) Subcostal, transtubercular, and two midclavicular planes give 9 regions. Transumbilical and median plane gives 4 regions. Four major muscles of the anterior abdominal wall: external oblique, internal oblique, transversus abdominus, rectus abdominus. Rectus sheath (recall what makes it up, and how it changes superior to inferior) (arcuate line) Inguinal ligament ( aponeuroses of external oblique, superficial inguinal. Inguinal canal: spermatic cord (male) or round ligament (female) passes through. Gubernaculum pulls testis through inguinal canal and into scrotum. Peritoneum becomes processus vaginalis, of which stalk is obliterated and remainder is tunica vaginalis. Due to the way testis descends, other anterior abdominal wall structures have analogous structures in spermatic cord and testis (be able to give detail) Ovaries migrate to lumbar region, but do not descend further.

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