ANAT 215 Lecture 20: Lecture 20
7 Aug 2015
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Document Summary
It protects the heart, lungs, and some vital abdominal organs. It provides the physical basis of the mechanics to allow us to breathe. 2 grooves [subclavian artery & vein] are separated by scalene tubercle]: rib 2 does not have an angle. It has a bump called the tuberosity: ribs 11 and 12 each have one facet only. They do not have a neck or a tubercle: muscles of the abdominal wall, external oblique originates from the ribs downward and forward to insert at the midline at the linea abla. It compresses the abdominal organs, and flexes and rotates the trunk: internal oblique originates from the ribs perpendicular to the external oblique to insert at the linea abla. Same functions: transverse abdominis [innermost] originates from the ribs and is horizontal along the lateral sides of the body. It compresses the abdominal organs & functions in coughing: the rectus abdominis consists of the linea abla.
