Tech in Surgery Prep / Unit 3 TSC 061 worked example, 60 to 90 seconds
The Abdominal Wall, Layer by Layer
The idea
The front and sides of the abdominal wall are formed by four pairs of muscles that meet at the midline.
In practice
Picture an incision going inward. First, skin, then the hypodermis. Second, in the center lies the rectus abdominis, a vertical muscle on each side of the midline, covered by a sheet of connective tissue called the rectus sheath. Third, to the sides, the wall has three flat muscles stacked in layers: the external oblique on the surface, the internal oblique in the middle, and the transversus abdominis deepest. Fourth, these muscles attach at the midline along the linea alba. Fifth, inside the muscle wall lies the parietal peritoneum, the serous lining of the abdominal cavity.
Where people slip
Each layer an incision passes through is a layer that must be closed again at the end. The order you learn here, from skin to peritoneum, is the reverse of the order in which the wall is closed.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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